231 results on '"Johnson, Cheryl C."'
Search Results
2. Comparing SARS-CoV-2 antigen-detection rapid diagnostic tests for COVID-19 self-testing/self-sampling with molecular and professional-use tests: a systematic review and meta-analysis
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Katzenschlager, Stephan, Brümmer, Lukas E., Schmitz, Stephani, Tolle, Hannah, Manten, Katharina, Gaeddert, Mary, Erdmann, Christian, Lindner, Andreas, Tobian, Frank, Grilli, Maurizio, Pollock, Nira R., Macé, Aurélien, Erkosar, Berra, Carmona, Sergio, Ongarello, Stefano, Johnson, Cheryl C., Sacks, Jilian A., Denkinger, Claudia M., and Yerlikaya, Seda
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- 2023
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3. The role of syphilis self-testing as an additional syphilis testing approach in key populations: a systematic review and meta-analysis
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Towns, Janet M, Tieosapjaroen, Warittha, Mello, Maeve B, Baggaley, Rachel C, Johnson, Cheryl C, Jamil, Muhammad S, Rowley, Jane, Barr-DiChiara, Magdalena, Terris-Prestholt, Fern, Chen, Marcus Y, Chow, Eric P F, Fairley, Christopher K, Zhang, Lei, and Ong, Jason J
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- 2023
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4. Determining the screening frequency for sexually transmitted infections for people who use HIV pre-exposure prophylaxis: a systematic review and meta-analysis
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Kim, Cham-mill, Zhao, Victor, Brito De Mello, Maeve, Baggaley, Rachel, Johnson, Cheryl C., Spielman, Erica, Fairley, Christopher K., Zhang, Lei, de Vries, Henry, Klausner, Jeffrey, Zhao, Rui, and Ong, Jason J.
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- 2023
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5. Examining the Use of HIV Self-Testing to Support PrEP Delivery: a Systematic Literature Review
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Kiptinness, Catherine, Kuo, Alexandra P., Reedy, Adriana M., Johnson, Cheryl C., Ngure, Kenneth, Wagner, Anjuli D., and Ortblad, Katrina F.
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- 2022
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6. HIV Testing Uptake According to Opt-In, Opt-Out or Risk-Based Testing Approaches: a Systematic Review and Meta-Analysis
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Soh, Qi Rui, Oh, Leon Y. J., Chow, Eric P. F., Johnson, Cheryl C., Jamil, Muhammad S., and Ong, Jason J.
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- 2022
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7. HIV prevalence ratio of international migrants compared to their native-born counterparts: A systematic review and meta-analysis
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Santoso, Devy, Asfia, Siti K.B.M., Mello, Maeve B., Baggaley, Rachel C., Johnson, Cheryl C., Chow, Eric P.F., Fairley, Christopher K., and Ong, Jason J.
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- 2022
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8. Linkage to care and prevention after HIV self‐testing: a systematic review and meta‐analysis.
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Zhang, Ying, Goh, Su Mei, Tapa, James, Johnson, Cheryl C., Chow, Eric P. F., Zhang, Lei, Phillips, Tiffany, Fairley, Christopher K., and Ong, Jason J.
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HIV infection transmission ,DIAGNOSIS of HIV infections ,HIV prevention ,ANTIRETROVIRAL agents ,ODDS ratio - Abstract
Introduction: Effective linkage to prevention and care is a crucial step following HIV testing services. This systematic review aimed to determine the proportion of individuals linked to prevention and care after HIV self‐testing (HIVST) and describe factors associated with linkage. Methods: Following PRISMA guidelines, a comprehensive search across eight databases (2010–October 2023) identified studies on linkage to care after HIVST, defined as receiving a confirmatory test or initiating antiretroviral therapy (ART) if the self‐test was reactive, and/or pre‐exposure prophylaxis (PrEP) if the self‐test was non‐reactive. A random‐effects meta‐analysis summarized the findings and meta‐regression explored study‐level covariates, such as world region, population type and service delivery model, that might explain the between‐study heterogeneity. Results: From 10,071 screened studies, 173 were included in the meta‐analysis. The majority of studies focused on key populations in Africa using unassisted, oral fluid‐based HIVST kits. Among those with reactive HIVST results, 92% (95% confidence interval [CI]: 88–95) were linked to confirmatory testing (n = 124 studies), and 89% (95% CI: 84–93) of newly diagnosed individuals initiated ART (n = 88 studies). Overall, 84% (95% CI: 74–93) of self‐testers were linked to care (n = 69 studies). However, only 9% (95% CI: 2–19) of individuals with non‐reactive HIVST results were linked to PrEP services (n = 9 studies). Assisted HIVST was associated with higher linkage rates to confirmatory testing and ART initiation compared to unassisted testing. Meta‐regression revealed that the type of delivery model for the HIVST kits influenced linkage and that individuals who obtained their HIVST kits through a social network‐based approach (SNA) were more likely to be linked to confirmatory testing (adjusted odds ratio = 1.28 [95% CI: 1.10–1.50], p = 0.001) compared to non‐SNA service delivery model. Discussion: In the context of expanding HIVST services globally, we found that linkage to confirmatory testing and ART initiation after HIVST is generally high, particularly when assisted HIVST or SNA‐based distribution is used. Conclusions: Strengthening timely linkage is vital for improving health outcomes, reducing HIV transmission and achieving the UNAIDS 95‐95‐95 goal. Ongoing research and collaboration with community‐based organizations are needed to overcoming barriers and ensuring positive outcomes for those using HIVST. PROSPERO Number: CRD42022357570. [ABSTRACT FROM AUTHOR]
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- 2024
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9. Usability and acceptability of oral-based HCV self-testing among key populations: a mixed-methods evaluation in Tbilisi, Georgia
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Fajardo, Emmanuel, Watson, Victoria, Kumwenda, Moses, Usharidze, Dali, Gogochashvili, Sophiko, Kakhaberi, David, Giguashvili, Ana, Johnson, Cheryl C., Jamil, Muhammad S., Dacombe, Russell, Stvilia, Ketevan, Easterbrook, Philippa, and Ivanova Reipold, Elena
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- 2022
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10. Partner-delivered HIV self-test kits with and without financial incentives in antenatal care and index patients with HIV in Malawi: a three-arm, cluster-randomised controlled trial
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Choko, Augustine T, Fielding, Katherine, Johnson, Cheryl C, Kumwenda, Moses K, Chilongosi, Richard, Baggaley, Rachel C, Nyirenda, Rose, Sande, Linda A, Desmond, Nicola, Hatzold, Karin, Neuman, Melissa, and Corbett, Elizabeth L
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- 2021
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11. Trends in knowledge of HIV status and efficiency of HIV testing services in sub-Saharan Africa, 2000–20: a modelling study using survey and HIV testing programme data
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Giguère, Katia, Eaton, Jeffrey W, Marsh, Kimberly, Johnson, Leigh F, Johnson, Cheryl C, Ehui, Eboi, Jahn, Andreas, Wanyeki, Ian, Mbofana, Francisco, Bakiono, Fidèle, Mahy, Mary, and Maheu-Giroux, Mathieu
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- 2021
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12. Demand creation for HIV testing services: A systematic review and meta-analysis
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Wagner, Anjuli D., Njuguna, Irene N., Neary, Jillian, Lawley, Kendall A., Louden, Diana K. N., Tiwari, Ruchi, Jiang, Wenwen, Kalu, Ngozi, Burke, Rachael M., Mangale, Dorothy, Obermeyer, Chris, Escudero, Jaclyn N., Bulterys, Michelle A., Waters, Chloe, Mollo, Bastien, Han, Hannah, Barr-DiChiara, Magdalena, Baggaley, Rachel, Jamil, Muhammad S., Shah, Purvi, Wong, Vincent J., Drake, Alison L., and Johnson, Cheryl C.
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Care and treatment ,Analysis ,Usage ,HIV patients -- Care and treatment ,HIV tests -- Analysis ,Practice guidelines (Medicine) -- Usage ,HIV testing -- Analysis - Abstract
Author(s): Anjuli D. Wagner 1,*, Irene N. Njuguna 1,2, Jillian Neary 3, Kendall A. Lawley 3, Diana K. N. Louden 4, Ruchi Tiwari 1, Wenwen Jiang 3, Ngozi Kalu 5, [...], Background HIV testing services (HTS) are the first steps in reaching the UNAIDS 95-95-95 goals to achieve and maintain low HIV incidence. Evaluating the effectiveness of different demand creation interventions to increase uptake of efficient and effective HTS is useful to prioritize limited programmatic resources. This review was undertaken to inform World Health Organization (WHO) 2019 HIV testing guidelines and assessed the research question, "Which demand creation strategies are effective for enhancing uptake of HTS?" focused on populations globally. Methods and findings The following electronic databases were searched through September 28, 2021: PubMed, PsycInfo, Cochrane CENTRAL, CINAHL Complete, Web of Science Core Collection, EMBASE, and Global Health Database; we searched IAS and AIDS conferences. We systematically searched for randomized controlled trials (RCTs) that compared any demand creation intervention (incentives, mobilization, counseling, tailoring, and digital interventions) to either a control or other demand creation intervention and reported HTS uptake. We pooled trials to evaluate categories of demand creation interventions using random-effects models for meta-analysis and assessed study quality with Cochrane's risk of bias 1 tool. This study was funded by the WHO and registered in Prospero with ID CRD42022296947. We screened 10,583 records and 507 conference abstracts, reviewed 952 full texts, and included 124 RCTs for data extraction. The majority of studies were from the African (N = 53) and Americas (N = 54) regions. We found that mobilization (relative risk [RR]: 2.01, 95% confidence interval [CI]: [1.30, 3.09], p < 0.05; risk difference [RD]: 0.29, 95% CI [0.16, 0.43], p < 0.05, N = 4 RCTs), couple-oriented counseling (RR: 1.98, 95% CI [1.02, 3.86], p < 0.05; RD: 0.12, 95% CI [0.03, 0.21], p < 0.05, N = 4 RCTs), peer-led interventions (RR: 1.57, 95% CI [1.15, 2.15], p < 0.05; RD: 0.18, 95% CI [0.06, 0.31], p < 0.05, N = 10 RCTs), motivation-oriented counseling (RR: 1.53, 95% CI [1.07, 2.20], p < 0.05; RD: 0.17, 95% CI [0.00, 0.34], p < 0.05, N = 4 RCTs), short message service (SMS) (RR: 1.53, 95% CI [1.09, 2.16], p < 0.05; RD: 0.11, 95% CI [0.03, 0.19], p < 0.05, N = 5 RCTs), and conditional fixed value incentives (RR: 1.52, 95% CI [1.21, 1.91], p < 0.05; RD: 0.15, 95% CI [0.07, 0.22], p < 0.05, N = 11 RCTs) all significantly and importantly ([greater than or equal to]50% relative increase) increased HTS uptake and had medium risk of bias. Lottery-based incentives and audio-based interventions less importantly (25% to 49% increase) but not significantly increased HTS uptake (medium risk of bias). Personal invitation letters and personalized message content significantly but not importantly ( Conclusions Mobilization, couple- and motivation-oriented counseling, peer-led interventions, conditional fixed value incentives, and SMS are high-impact demand creation interventions and should be prioritized for programmatic consideration. Reduced duration counseling and video-based interventions are an efficient and effective alternative to address staffing shortages. Investment in demand creation activities should prioritize those with undiagnosed HIV or ongoing HIV exposure. Selection of demand creation interventions must consider risks and benefits, context-specific factors, feasibility and sustainability, country ownership, and universal health coverage across disease areas.
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- 2023
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13. Cost-effectiveness of SARS-CoV-2 self-testing at routine gatherings to minimize community-level infections in lower-middle income countries: A mathematical modeling study.
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Hansen, Megan A., Han, Alvin X., Chevalier, Joshua M., Klock, Ethan, Pandithakoralage, Hiromi, Nooy, Alexandra de, Ockhuisen, Tom, Girdwood, Sarah J., Lekodeba, Nkgomeleng A., Khan, Shaukat, Jenkins, Helen E., Johnson, Cheryl C., Sacks, Jilian A., Russell, Colin A., and Nichols, Brooke E.
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COVID-19 pandemic ,VACCINE effectiveness ,INFECTIOUS disease transmission ,VACCINATION coverage ,SARS-CoV-2 - Abstract
Places of worship serve as a venue for both mass and routine gathering around the world, and therefore are associated with risk of large-scale SARS-CoV-2 transmission. However, such routine gatherings also offer an opportunity to distribute self-tests to members of the community to potentially help mitigate transmission and reduce broader community spread of SARS-CoV-2. Over the past four years, self-testing strategies have been an impactful tool for countries' response to the COVID-19 pandemic, especially early on to mitigate the spread when vaccination and treatment options were limited. We used an agent-based mathematical model to estimate the impact of various strategies of symptomatic and asymptomatic self-testing for a fixed percentage of weekly routine gatherings at places of worship on community transmission of SARS-CoV-2 in Brazil, Georgia, and Zambia. Testing strategies assessed included weekly and bi-weekly self-testing across varying levels of vaccine effectiveness, vaccine coverage, and reproductive numbers to simulate developing stages of the COVID-19 pandemic. Self-testing symptomatic people attending routine gatherings can cost-effectively reduce the spread of SARS-CoV-2 within places of worship and the community, resulting in incremental cost-effectiveness ratios of $69-$303 USD. This trend is especially true in contexts where population level attendance at such gatherings is high, demonstrating that a distribution approach is more impactful when a greater proportion of the population is reached. Asymptomatic self-testing of attendees at 100% of places of worship in a country results in the greatest percent of infections averted and is consistently cost-effective but remains costly. Budgetary needs for asymptomatic testing are expensive and likely unaffordable for lower-middle income countries (520-1550x greater than that of symptomatic testing alone), promoting that strategies to strengthen symptomatic testing should remain a higher priority. [ABSTRACT FROM AUTHOR]
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- 2024
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14. Social network‐based approaches to HIV testing: a systematic review and meta‐analysis.
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Choong, Annabelle, Lyu, Yi Ming, Johnson, Cheryl C., Baggaley, Rachel, Barr‐DiChiara, Magdalena, Jamil, Muhammad S., Siegfried, Nandi L., Fairley, Christopher K., Chow, Eric P. F., Macdonald, Virginia, and Ong, Jason J.
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DIAGNOSIS of HIV infections ,MONETARY incentives ,SOCIAL contact ,SOCIAL networks ,CONFORMANCE testing - Abstract
Introduction: Social network‐based testing approaches (SNAs) encourage individuals ("test promoters") to motivate sexual partners and/or those in their social networks to test for HIV. We conducted a systematic review to examine the effectiveness, acceptability and cost‐effectiveness of SNA. Methods: We searched five databases from January 2010 to May 2023, and included studies that compared SNA with non‐SNA. We used random‐effects meta‐analysis to combine effect estimates. Certainty was assessed using the GRADE approach. Results: We identified 47 studies. SNA may increase uptake of HIV testing compared to non‐SNA (RR 2.04, 95% CI: 1.06–3.95, Low certainty). The proportion of first‐time testers was probably higher among partners or social contacts of test promoters using SNA compared to non‐SNA (RR 1.49, 95% CI: 1.22–1.81, Moderate certainty). The proportion of people who tested positive for HIV may be higher among partners or social contacts of test promoters using SNA compared to non‐SNA (RR 1.84, 95% CI: 1.01–3.35, Low certainty). There were no reports of any adverse events or harms associated with SNA. Based on six cost‐effectiveness studies, SNA was generally cheaper per person tested and per person diagnosed compared to non‐SNA. Based on 23 qualitative studies, SNA is likely to be acceptable to a variety of populations. Discussion: Our review collated evidence for SNA to HIV testing covering the key populations and the general population who may benefit from HIV testing. We summarized evidence for the effectiveness, acceptability and cost‐effectiveness of different models of SNA. While we did not identify an ideal model of SNA that could be immediately scaled up, for each setting and population targeted, we recommend various implementation considerations as our meta‐analysis showed the effectiveness might differ due to factors which include the testing modality (i.e. use of HIV self‐testing), type of test promoters, long or short duration of recruitment and use of financial incentives. Conclusions: Social network‐based approaches may enhance HIV testing uptake, increase the proportion of first‐time testers and those testing positive for HIV. Heterogeneity among studies highlights the need for context‐specific adaptations, but the overall positive impact of SNA on HIV testing outcomes could support its integration into existing HIV testing services. [ABSTRACT FROM AUTHOR]
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- 2024
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15. Optimizing HIV testing services in sub-Saharan Africa: cost and performance of verification testing with HIV self-tests and tests for triage
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Eaton, Jeffrey W., Terris-Prestholt, Fern, Cambiano, Valentina, Sands, Anita, Baggaley, Rachel C., Hatzold, Karin, Corbett, Elizabeth L., Kalua, Thoko, Jahn, Andreas, Johnson, Cheryl C, and Johnson, Cheryl C.
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Diagnosis ,Statistics ,Usage ,Patient outcomes ,HIV patients -- Statistics ,HIV infections -- Patient outcomes -- Diagnosis ,HIV tests -- Usage - Abstract
1 | INTRODUCTION Substantial scale-up of HIV testing services (HTS) has contributed to tremendous progress towards global targets to diagnose 90% of people with HIV by 2020. In 2017, PEPFAR [...], Introduction: Strategies employing a single rapid diagnostic test (RDT) such as HIV self-testing (HIVST) or "test for triage" (T4T) are proposed to increase HIV testing programme impact. Current guidelines recommend serial testing with two or three RDTs for HIV diagnosis, followed by retesting with the same algorithm to verify HIV-positive status before anti-retroviral therapy (ART) initiation. We investigated whether clients presenting to HIV testing services (HTS) following a single reactive RDT must undergo the diagnostic algorithm twice to diagnose and verify HIV-positive status, or whether a diagnosis with the setting-specific algorithm is adequate for ART initiation. Methods: We calculated (1) expected number of false-positive (FP) misclassifications per 10,000 HIV negative persons tested, (2) positive predictive value (PPV) of the overall HIV testing strategy compared to the WHO recommended PPV >99%, and (3) expected cost per FP misclassified person identified by additional verification testing in a typical low-/middle-income setting, compared to the expected lifetime ART cost of $3000. Scenarios considered were as follows: 10% prevalence using two serial RDTs for diagnosis, 1% prevalence using three serial RDTs, and calibration using programmatic data from Malawi in 2017 where the proportion of people testing HIV positive in facilities was 4%. Results: In the 10% HIV prevalence setting with a triage test, the expected number of FP misclassifications was 0.86 per 10,000 tested without verification testing and the PPV was 99.9%. In the 1% prevalence setting, expected FP misclassifications were 0.19 with 99.8% PPV, and in the Malawi 2017 calibrated setting the expected misclassifications were 0.08 with 99.98% PPV. The cost per FP identified by verification testing was $5879, $3770, and $24,259 respectively. Results were sensitive to assumptions about accuracy of self-reported reactive results and whether reactive triage test results influenced biased interpretation of subsequent RDT results by the HTS provider. Conclusions: Diagnosis with the full algorithm following presentation with a reactive triage test is expected to achieve PPV above the 99% threshold. Continuing verification testing prior to ART initiation remains recommended, but HIV testing strategies involving HIVST and T4T may provide opportunities to maintain quality while increasing efficiency as part of broader restructuring of HIV testing service delivery. Keywords: HIV; HIV testing; HIV self-testing; Retesting; ART initiation; Quality
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- 2019
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16. Accuracy of and preferences for blood-based versus oral-fluid-based HIV self-testing in Malawi: a cross-sectional study
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O’Reilly, Ailva, Mavhu, Webster, Neuman, Melissa, Kumwenda, Moses K., Johnson, Cheryl C., Sinjani, George, Indravudh, Pitchaya, Choko, Augustin, Hatzold, Karin, and Corbett, Elizabeth L.
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- 2022
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17. Lessons learned from implementation of four HIV self-testing (HIVST) distribution models in Zambia: applying the Consolidated Framework for Implementation Research to understand impact of contextual factors on implementation
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Simwinga, Musonda, Gwanu, Lwiindi, Hensen, Bernadette, Sigande, Lucheka, Mainga, Mwami, Phiri, Thokozile, Mwanza, Eliphas, Kabumbu, Mutale, Mulubwa, Chama, Mwenge, Lawrence, Bwalya, Chiti, Kumwenda, Moses, Mubanga, Ellen, Mee, Paul, Johnson, Cheryl C., Corbett, Elizabeth L., Hatzold, Karin, Neuman, Melissa, Ayles, Helen, and Taegtmeyer, Miriam
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- 2022
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18. Preferences and uptake of home-based HIV self-testing for maternal retesting in Kenya.
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Drake, Alison L., Jiang, Wenwen, Kitao, Peninah, Farid, Shiza, Richardson, Barbra A., Katz, David A., Wagner, Anjuli D., Johnson, Cheryl C., Matemo, Daniel, Stewart, GraceJohn, and Kinuthia, John
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RAPID diagnostic tests ,BLOOD testing ,HIV testing kits ,PRENATAL care ,PATIENT self-monitoring ,PREGNANCY - Abstract
Objective: To compare preferences, uptake, and cofactors for unassisted home-based oral self-testing (HB-HIVST) versus clinic-based rapid diagnostic blood tests (CB-RDT) for maternal HIV retesting. Design: Prospective cohort. Methods: Between November 2017 and June 2019, HIV-negative pregnant Kenyan women receiving antenatal care were enrolled and given a choice to retest with HB-HIVST or CB-RDT. Women were asked to retest between 36 weeks gestation and 1-week post-delivery if the last HIV test was <24 weeks gestation or at 6 weeks postpartum if ≥24 weeks gestation, and self-report on retesting at a 14-week postpartum. Results: Overall, 994 women enrolled and 33% (n = 330) selected HB-HIVST. HB-HIVST was selected because it was private (n = 224, 68%), convenient (n = 211, 63%), and offered flexibility in the timing of retesting (n = 207, 63%), whereas CB-RDT was selected due to the trust of providers to administer the test (n = 510, 77%) and convenience of clinic testing (n = 423, 64%). Among 905 women who reported retesting at follow-up, 135 (15%) used HB-HIVST. Most (n = 595, 94%) who selected CB-RDT retested with this strategy, compared to 39% (n = 120) who selected HB-HIVST retesting with HB-HIVST. HB-HIVST retesting was more common among women with higher household income and those who may have been unable to test during pregnancy (both retested postpartum and delivered <37 weeks gestation) and less common among women who were depressed. Most women said they would retest in the future using the test selected at enrollment (99% [n = 133] HB-HIVST; 93% [n = 715] CB-RDT-RDT). Conclusions: While most women preferred CB-RDT for maternal retesting, HB-HIVST was acceptable and feasible and could be used to expand HIV retesting options. [ABSTRACT FROM AUTHOR]
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- 2024
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19. A typology of HIV self-testing support systems: a scoping review.
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Tran, Arron, Tran, Nghiep, Tapa, James, Tieosapjaroen, Warittha, Fairley, Christopher K., Chow, Eric P. F., Zhang, Lei, Baggaley, Rachel C., Johnson, Cheryl C., Jamil, Muhammad S., and Ong, Jason J.
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To maximise the benefits of HIV self-testing (HIVST), it is critical to support self-testers in the testing process and ensure that they access appropriate prevention and care. To summarise systems and tools supporting HIVST (hereafter, 'support systems') and categorise them for future analysis, we synthesised the global data on HIVST support systems and proposed a typology. We searched five databases for articles reporting on one or more HIVST support systems and included 314 publications from 224 studies. Across 189 studies, there were 539 reports of systems supporting HIVST use; while across 115 studies, there were 171 reports of systems supporting result interpretation. Most commonly, these were pictorial instructions, followed by in-person demonstrations and in-person assistance while self-testing or reading self-test results. Less commonly, virtual interventions were also identified, including online video conferencing and smartphone apps. Smartphone-based automated result readers have been used in the USA, China, and South Africa. Across 173 studies, there were 987 reports of systems supporting post-test linkage to care; most commonly, these were in-person referrals/counselling, written referrals, and phone helplines. In the USA, Bluetooth beacons have been trialled to monitor self-test use and facilitate follow-up. We found that, globally, HIVST support systems use a range of methods, including static media, virtual tools, and in-person engagement. In-person and printed approaches were more common than virtual tools. Other considerations, such as linguistic and cultural appropriateness, may also be important in the development of effective HIVST programs. The success of HIV self-testing requires the user to accurately use the self-test, interpret the result, and be linked to relevant follow-up services. We summarised the systems and tools that have been used to support users through the self-testing process ('support systems'), and found a diverse range of support systems, including pictorial instructions, in-person support, and virtual tools. We have developed a typology to categorise these support systems, which can be used as a framework for further research. [ABSTRACT FROM AUTHOR]
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- 2024
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20. Who is reached by HIV self-testing? Individual factors associated with self-testing within a community-based programme in rural Malawi
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Indravudh, Pitchaya P., Hensen, Bernadette, Nzawa, Rebecca, Chilongosi, Richard, Nyirenda, Rose, Johnson, Cheryl C., Hatzold, Karin, Fielding, Katherine, Corbett, Elizabeth L, and Neuman, Melissa
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- 2020
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21. Who are the missing men? Characterising men who never tested for HIV from population-based surveys in six sub-Saharan African countries
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Quinn, Caitlin, Kadengye, Damazo T., Johnson, Cheryl C., Baggaley, Rachel, and Dalal, Shona
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Industria Confezione Abbigliamento Perugia S.p.A. ,World Health Organization -- Surveys ,Sexual behavior ,Risk factors ,Surveys ,Health surveys -- Surveys ,HIV tests -- Surveys ,HIV -- Risk factors -- Surveys ,Missing persons -- Surveys - Abstract
1 | INTRODUCTION Reaching people with undiagnosed HIV is critical to curbing the HIV epidemic. The first 90 of the United Nations 90-90-90 targets is for 90% of people with [...], Introduction: We sought to characterize men who had never tested for HIV, understand factors associated with not testing, and measure survey HIV test uptake among never testers. We analysed nationally representative Demographic and Health Surveys of six African countries from 2013 to 2016: Ethiopia, Malawi, Zimbabwe, Rwanda, Lesotho and Zambia. Methods: Eligible men were household residents or overnight visitors aged 15 to 59 years. We analysed questionnaire responses on HIV testing, known behavioural risk factors, and corresponding HIV laboratory results. We used survey-weighted logistic regression to identify factors associated with never testing for HIV. Results: Approximately double the proportion of men had never tested for HIV compared to women (Malawi: 30% vs. 17%, p < 0.0001; Zimbabwe: 35% vs. 19%, p < 0.0001; Lesotho: 34% vs. 15%, p < 0.0001; Zambia: 36% vs. 20%, p < 0.0001); although, less of a differential existed in Ethiopia (54% vs. 56%, p = 0.12) and Rwanda (19% vs. 14%, p < 0.0001). When offered a test during the survey, 85% to 99% of sexually active men who reported never previously testing, accepted testing. HIV positivity ranged from Conclusions: Although higher proportions of men than women had never tested for HIV, 85% to 99% of men did accept a test when offered. Finding opportunities to offer HIV testing to single men without children, older men who have never tested, and those disadvantaged with less schooling and employment, alongside other facility and community-based services, will be important in identifying those living with undiagnosed HIV and improving men's health. Keywords: HIV/AIDS; men; HIV testing; Africa South of the Sahara; Health surveys
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- 2019
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22. Retest and treat: a review of national HIV retesting guidelines to inform elimination of mother-to-child HIV transmission (EMTCT) efforts
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Drake, Alison L., Thomson, Kerry A., Quinn, Caitlin, Owiredu, Morkor Newman, Nuwagira, Innocent B., Chitembo, Lastone, Essajee, Shaffiq, Baggaley, Rachel, and Johnson, Cheryl C.
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Diagnosis ,Care and treatment ,Usage ,Analysis ,Risk factors ,Health aspects ,HIV infections -- Diagnosis -- Care and treatment -- Risk factors ,Disease transmission -- Risk factors ,HIV tests -- Usage ,Child health -- Analysis ,Mother-child relations -- Analysis ,Breast feeding -- Health aspects - Abstract
1 | INTRODUCTION Maternal HIV testing and treatment is the cornerstone of prevention of mother-to-child HIV transmission (PMTCT) programmes, and has helped to prevent over two million paediatric HIV infections [...], Introduction: High maternal HIV incidence contributes substantially to mother-to-child HIV transmission (MTCT) in some settings. Since 2006, HIV retesting during the third trimester and breastfeeding has been recommended by the World Health Organization in higher prevalence ([greater than or equal to]5%) settings to reduce MTCT. However, many countries lack clarity on when and how often to retest pregnant and postpartum women to optimize resources and service delivery. We reviewed and characterized national guidelines on maternal retesting based on timing and frequency. Methods: We identified 52 countries to represent variations in HIV prevalence, geography, and MTCT priority and searched available national MTCT, HIV testing and HIV treatment policies published between 2007 and 2017 for recommendations on retesting during pregnancy, labour/delivery and postpartum. Recommended retesting frequency and timing was extracted. Country HIV prevalence was classified as: very low (5 to Results and discussion: Overall, policies from 49 countries were identified; 51% from 2015 or later and most (n = 25) were from Africa. Four countries were high HIV prevalence, seven intermediate, sixteen low and twenty-two very low. Most (n = 31) had guidance on universal voluntary opt-out HIV testing at the first antenatal care (ANC) visit. Beyond the first ANC visit, the majority (78%, n = 38) had guidance on retesting; 22 recommended retesting all women with unknown/negative status, five only if unknown HIV status, three in pregnancy based on risk and eight combining these approaches. Retesting was universally recommended during pregnancy, labour/delivery and postpartum for all high prevalence settings and four of seven intermediate prevalence settings. Five UNAIDS priority countries for EMTCT with low/very low HIV prevalence, but high/intermediate MTCT, had no guidance on retesting. Conclusions: Retesting guidelines for pregnant and postpartum women were ubiquitous in high prevalence countries and defined in some intermediate prevalence countries, but absent in some low HIV prevalence countries with high MTCT. Countries may require additional guidance on how to optimize maternal HIV testing and whether to prioritize retesting efforts or discontinue universal retesting based on HIV incidence. Research is needed to assess country-level guideline implementation and impact. Keywords: HIV; mother-to-child transmission; retesting; incidence; prevention of mother-to-child HIV transmission
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- 2019
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23. The impact and cost-effectiveness of community-based HIV self-testing in sub-Saharan Africa: a health economic and modelling analysis
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Cambiano, Valentina, Johnson, Cheryl C., Hatzold, Karin, Terris-Prestholt, Fern, Maheswaran, Hendy, Thirumurthy, Harsha, Figueroa, Carmen, Cowan, Frances M., Sibanda, Euphemia L., Ncube, Getrude, Revill, Paul, Baggaley, Rachel C., Corbett, Elizabeth L., and Phillips, Andrew
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Diagnosis ,Economic aspects ,Usage ,Health care costs -- Economic aspects ,Highly active antiretroviral therapy -- Usage ,HIV infections -- Diagnosis ,HIV tests -- Usage - Abstract
1 | INTRODUCTION The ambitious UNAIDS targets, set in 2014, of diagnosing 90% of people living with HIV, having 90% of those diagnosed on antiretroviral treatment (ART) and having virological [...], Introduction: The prevalence of undiagnosed HIV is declining in Africa, and various HIV testing approaches are finding lower positivity rates. In this context, the epidemiological impact and cost-effectiveness of community-based HIV self-testing (CB-HIVST) is unclear. We aimed to assess this in different sub-populations and across scenarios characterized by different adult HIV prevalence and antiretroviral treatment programmes in sub-Saharan Africa. Methods: The synthesis model was used to address this aim. Three sub-populations were considered for CB-HIVST: (i) women having transactional sex (WTS); (ii) young people (15 to 24 years); and (iii) adult men (25 to 49 years). We assumed uptake of CB-HIVST similar to that reported in epidemiological studies (base case), or assumed people use CB-HIVST only if exposed to risk (condomless sex) since last HIV test. We also considered a five-year time-limited CB-HIVST programme. Cost-effectiveness was defined by an incremental cost-effectiveness ratio (ICER; cost-per-disability-adjusted life-year (DALY) averted) below US$500 over a time horizon of 50 years. The efficiency of targeted CB-HIVST was evaluated using the number of additional tests per infection or death averted. Results: In the base case, targeting adult men with CB-HIVST offered the greatest impact, averting 1500 HIV infections and 520 deaths per year in the context of a simulated country with nine million adults, and impact could be enhanced by linkage to voluntary medical male circumcision (VMMC). However, the approach was only cost-effective if the programme was limited to five years or the undiagnosed prevalence was above 3%. CB-HIVST to WTS was the most cost-effective. The main drivers of cost-effectiveness were the cost of CB-HIVST and the prevalence of undiagnosed HIV. All other CB-HIVST scenarios had an ICER above US$500 per DALY averted. Conclusions: CB-HIVST showed an important epidemiological impact. To maximize population health within a fixed budget, CB-HIVST needs to be targeted on the basis of the prevalence of undiagnosed HIV, sub-population and the overall costs of delivering this testing modality. Linkage to VMMC enhances its cost-effectiveness. Keywords: HIV testing, community-based HIV self-testing; cost-effectiveness; mathematical modelling; HIV; benefits and cost
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- 2019
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24. The Self-Testing AfRica (STAR) Initiative: accelerating global access and scale-up of HIV self-testing
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Ingold, Heather, Mwerinde, Ombeni, Ross, Anna Laura, Leach, Ross, Corbett, Elizabeth L., Hatzold, Karin, Johnson, Cheryl C., Ncube, Getrude, Nyirenda, Rose, and Baggaley, Rachel C.
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Diagnosis ,Prevention ,Usage ,Patient outcomes ,HIV infections -- Prevention -- Patient outcomes -- Diagnosis ,HIV tests -- Usage ,Medical research - Abstract
1 | INTRODUCTION HIV testing is the gateway to treatment and care and expanded prevention coverage. The first of the United Nations' 90-90-90 Fast Track targets to end the HIV [...], Introduction: HIV self-testing (HIVST) was first proposed as an additional option to standard HIV testing services in the 1980s. By 2015, two years after the first HIVST kit was approved for the American market and the year in which Unitaid invested in the "HIV Self-Testing AfRica (STAR) Initiative," HIVST remained unexplored with negligible access in low- and middle-income countries (LMIC). However, rapid progress had been made. This commentary outlines the interlinked market, regulatory and policy barriers that had inhibited product development and kept HIVST out of LMIC policy. We detail the components of STAR that enabled rapid HIVST scale-up, including critical investments in implementation, research, market forecasting, and engagement with manufacturers and regulators. Discussion: The STAR Initiative has generated crucial information about how to distribute HIVST products effectively, ethically and efficiently. Service delivery models range from clinic-based distribution to workplace and partner-delivered approaches to reach first-time male testers, to community outreach to sex workers and general population "hotspots." These data directly informed supportive policy, notably the 2016 WHO guidelines strongly recommending HIVST as an additiona testing approach, and regulatory change through support for WHO prequalification of the first HIVST kit in 2017. In July 2015, only two countries had national HIVST policies and were implementing HIVST. Three years later, 59 countries have policies, actively implemented in 28, with an additional 53 countries reporting policies under development. By end-November 2018 several quality-assured HIVST products had been registered, including two WHO prequalified tests. STAR Initiative countries have drafted regulations governing in vitro diagnostics, including HIVST products. With enabling policies, pre-qualification and regulations in place, donor procurement of kits has increased rapidly, to a forecasted estimate of 16 million HIVST kits procured by 2020. Conclusions: The STAR Initiative provided a strong foundation to introduce HIVST in LMICs and allow for rapid scale-up based on the wealth of multi-country evidence gathered. Together with sustained coordination and acceleration of market development work, HIVST can help address the testing gap and provide a focused and cost-effective means to expand access to treatment and prevention services. Keywords: HIV testing; HIV self-testing; market shaping; scale-up; prevention; linkage to care; cost effectiveness
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- 2019
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25. Exploring social harms during distribution of HIV self-testing kits using mixed-methods approaches in Malawi
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Kumwenda, Moses K., Johnson, Cheryl C., Choko, Augustine T., Lora, Wezzie, Sibande, Wakumanya, Sakala, Doreen, Indravudh, Pitchaya, Chilongosi, Richard, Baggaley, Rachael C., Nyirenda, Rose, Taegtmeyer, Miriam, Hatzold, Karin, Desmond, Nicola, and Corbett, Elizabeth L.
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Diagnosis ,Usage ,Analysis ,Clinical trials -- Analysis ,HIV infections -- Diagnosis ,HIV tests -- Usage - Abstract
1 | INTRODUCTION Despite concerted efforts to scale-up HIV testing services, in 2017, approximately 25% of people with HIV remain undiagnosed [1]. Globally, men, young people and key populations are [...], Introduction: HIV self-testing (HIVST) provides couples and individuals with a discreet, convenient and empowering testing option. As with all HIV testing, potential harms must be anticipated and mitigated to optimize individual and public health benefits. Here, we describe social harms (SHs) reported during HIVST implementation in Malawi, and propose a framework for grading and responding to harms, according to their severity. Methods: We report findings from six HIVST implementation studies in Malawi (2011 to 2017) that included substudies investigating SH reports. Qualitative methods included focus group discussions, in-depth interviews and critical incident interviews. Earlier studies used intensive quantitative methods (post-test questionnaires for intimate partner violence, household surveys, investigation of all deaths in HIVST communities). Later studies used post-marketing reporting with/without community engagement. Pharmacovigilance methodology (whereby potentially life-threatening/changing events are defined as "serious") was used to grade SH severity, assuming more complete passive reporting for serious events. Results: During distribution of 175,683 HIVST kits, predominantly under passive SH reporting, 25 serious SHs were reported from 19 (0.011%) self-testers, including 15 partners in eight couples with newly identified HIV discordancy, and one perinatally infected adolescent. There were no deaths or suicides. Marriage break-up was the most commonly reported serious SH (sixteen individuals; eight couples), particularly among serodiscordant couples. Among new concordant HIV-positive couples, blame and frustration was common but rarely (one episode) led to serious SHs. Among concordant HIV-negative couples, increased trust and stronger relationships were reported. Coercion to test or disclose was generally considered "well-intentioned" within established couples. Women felt empowered and were assertive when offering HIVST test kits to their partners. Some women who persuaded their partner to test, however, did report SHs, including verbal or physical abuse and economic hardship. Conclusions: After more than six years of large-scale HIVST implementation and in-depth investigation of SHs in Malawi, we identified approximately one serious reported SH per 10,000 HIVST kits distributed, predominantly break-up of married serodiscordant couples. Both "active" and "passive" reporting systems identified serious SH events, although with more complete capture by "active" systems. As HIVST is scaled-up, efforts to support and further optimize community-led SH monitoring should be prioritized alongside HIVST distribution. Keywords: HIV/AIDS; HIV self-test; HIV testing; social harms; Malawi
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- 2019
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26. Economic cost analysis of door-to-door community-based distribution of HIV self-test kits in Malawi, Zambia and Zimbabwe
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Mangenah, Collin, Mwenge, Lawrence, Sande, Linda, Ahmed, Nurilign, d'Elbee, Marc, Chiwawa, Progress, Chigwenah, Tariro, Kanema, Sarah, Mutseta, Miriam N., Nalubamba, Mutinta, Chilongosi, Richard, Indravudh, Pitchaya, Sibanda, Euphemia L., Neuman, Melissa, Ncube, Getrude, Ong, Jason J., Mugurungi, Owen, Hatzold, Karin, Johnson, Cheryl C., Ayles, Helen, Corbett, Elizabeth L., Cowan, Frances M., Maheswaran, Hendramoorthy, and Terris-Prestholt, Fern
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Economic aspects ,Usage ,Health care costs -- Economic aspects ,HIV tests -- Usage - Abstract
1 | INTRODUCTION In East and Southern Africa, freely available HIV services have led to a 42% reduction in AIDS-related deaths between 2010 and 2016. Despite such gains, 24% of [...], Introduction: HIV self-testing (HIVST) is recommended by the World Health Organization in addition to other testing modalities to increase uptake of HIV testing, particularly among harder-to-reach populations. This study provides the first empirica evidence of the costs of door-to-door community-based HIVST distribution in Malawi, Zambia and Zimbabwe. Methods: HIVST kits were distributed door-to-door in 71 sites across Malawi, Zambia and Zimbabwe from June 2016 to May 2017. Programme expenditures, supplemented by on-site observation and monitoring and evaluation data were used to estimate total economic and unit costs of HIVST distribution, by input and site. Inputs were categorized into start-up, capital and recurrent costs. Sensitivity and scenario analyses were performed to assess the impact of key parameters on unit costs. Results: In total, 152,671, 103,589 and 93,459 HIVST kits were distributed in Malawi, Zambia and Zimbabwe over 12, 11 and 10 months respectively. Across these countries, 43% to 51% of HIVST kits were distributed to men. The average cost per HIVST kit distributed was US$8.15, US$16.42 and US$13.84 in Malawi, Zambia and Zimbabwe, respectively, with pronounced intersite variation within countries driven largely by site-level fixed costs. Site-level recurrent costs were 70% to 92% of full costs and 20% to 62% higher than routine HIV testing services (HTS) costs. Personnel costs contributed from 26% to 52% of total costs across countries reflecting differences in remuneration approaches and country GDP. Conclusions: These early door-to-door community HIVST distribution programmes show large potential, both for reaching untested populations and for substantial economies of scale as HIVST programmes scale-up and mature. From a societal perspective, the costs of HIVST appear similar to conventional HTS, with the higher providers' costs substantially offsetting user costs. Future approaches to minimizing cost and/or maximize testing coverage could include unpaid door-to-door community-led distribution to reach end-users and integrating HIVST into routine clinical services via direct or secondary distribution strategies with lower fixed costs. Keywords: HIV self-testing; costs and cost analysis; community; Malawi; Zambia; Zimbabwe
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- 2019
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27. HIV self-testing: breaking the barriers to uptake of testing among men and adolescents in sub-Saharan Africa, experiences from STAR demonstration projects in Malawi, Zambia and Zimbabwe
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Hatzold, Karin, Gudukeya, Stephano, Mutseta, Miriam N., Chilongosi, Richard, Nalubamba, Mutinta, Nkhoma, Chiwawa, Munkombwe, Hambweka, Munjoma, Malvern, Mkandawire, Phillip, Mabhunu, Varaidzo, Smith, Gina, Madidi, Ngonidzashe, Ahmed, Hussein, Kambeu, Taurai, Stankard, Petra, Johnson, Cheryl C., and Corbett, Elizabeth L.
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Diagnosis ,Usage ,Health aspects ,HIV infections -- Diagnosis ,HIV tests -- Usage ,Youth -- Health aspects - Abstract
1 | INTRODUCTION In 2016, 36.7 million people were living with HIV (PLHIV), with 1.8 million new HIV infections and one million HIV/AIDS-related deaths [1]. Despite substantial progress toward the [...], Introduction: Social, structural and systems barriers inhibit uptake of HIV testing. HIV self-testing (HIVST) has shown promising uptake by otherwise underserved priority groups including men, young people and first-time testers. Here, we use characteristics of HIVST kit recipients to investigate delivery to these priority groups during HIVST scale-up in three African countries. Methods: Kit distributors collected individual-level age, sex and testing history from all clients. These data were aggregated and analysed by country (Malawi, Zambia and Zimbabwe) for five distribution models: local community-based distributor (CBD: door-to-door, street and local venues), workplace distribution (WD), integration into HIV testing services (IHTS), or pubic health facilities (IPHF) and during demand creation for voluntary male medical circumcision (VMMC). Used kits were collected and re-read from CBD and IHTS recipients. Results: Between May 2015 and July 2017, 628,705 HIVST kits were distributed in Malawi (172,830), Zambia (190,787) and Zimbabwe (265,091). Community-based models, the first to be established, accounted for 519,658 (82.7%) of kits distributed, with 275,419 (53.0%) used kits returned. Subsequent model diversification delivered 54,453 (8.7%) test-kits through IHTS, 23,561 (3.7%) through VMMC, 21,183 (3.4%) through IPHF and 9850 (1.7%) through WD. Men took 294,508 (48.2%) kits, and 263,073 (43.1%) went to young people (16 to 24 years). A higher proportion of male self-testers (65,577; 22.3%) were first-time testers than women (54,096; 17.1%) with this apparent in Zimbabwe (16.2% vs. 11.4%), Zambia (25.4% vs. 17.7%) and Malawi (27.9% vs. 25.9%). The highest proportions of first-time testers were in young (16 to 24 years) and older (>50 years) men (country-ranges: 18.7% to 35.9% and 13.8% to 26.8% respectively). Most IHTS clients opted for HIVST in preference to standard HTS in each of 12 delivery sites, with those selecting HIVST having lower HIV prevalence, potentially due to self-selection. Conclusions: HIVST delivered at scale using several different models reached a high proportion of men, young people and first-time testers in Malawi, Zambia and Zimbabwe, some of whom may not have tested otherwise. As men and young people have limited uptake under standard facility-and community-based HIV testing, innovative male- and youth-sensitive approaches like HIVST may be essential to reaching UNAIDS fast-track targets for 2020. Keywords: HIV self-testing; HIV testing; men; adolescents; stigma; Malawi; Zambia; Zimbabwe
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- 2019
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28. Applying user preferences to optimize the contribution of HIV self-testing to reaching the 'first 90' target of UNAIDS Fast-track strategy: results from discrete choice experiments in Zimbabwe
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Sibanda, Euphemia L., d'Elbee, Marc, Maringwa, Galven, Ruhode, Nancy, Tumushime, Mary, Madanhire, Claudius, Ong, Jason J., Indravudh, Pitchaya, Watadzaushe, Constancia, Johnson, Cheryl C., Hatzold, Karin, Taegtmeyer, Miriam, Hargreaves, James R., Corbett, Elizabeth L., Cowan, Frances M., and Terris-Prestholt, Fern
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Diagnosis ,Evaluation ,Usage ,Patient outcomes ,HIV infections -- Patient outcomes -- Diagnosis ,HIV tests -- Usage -- Evaluation - Abstract
1 | INTRODUCTION HIV testing is an important entry point for uptake of prevention, treatment and care services. The United Nations 90-90-90 targets are that by 2020, 90% of people [...], Introduction: New HIV testing strategies are needed to reach the United Nations' 90-90-90 target. HIV self-testing (HIVST) can increase uptake, but users' perspectives on optimal models of distribution and post-test services are uncertain. We used discrete choice experiments (DCEs) to explore the impact of service characteristics on uptake along the testing cascade. Methods: DCEs are a quantitative survey method that present respondents with repeated choices between packages of service characteristics, and estimate relative strengths of preferences for service characteristics. From June to October 2016, we embedded DCEs within a population-based survey following door-to-door HIVST distribution by community volunteers in two rural Zimbabwean districts: one DCE addressed HIVST distribution preferences; and the other preferences for linkage to confirmatory testing (LCT) following self-testing. Using preference coefficients/utilities, we identified key drivers of uptake for each service and simulated the effect of changes of outreach and static/public clinics' characteristics on LCT. Results: Distribution and LCT DCEs surveyed 296/329 (90.0%) and 496/594 (83.5%) participants; 81.8% and 84.9% had ever-tested, respectively. The strongest distribution preferences were for: (1) free kits - a $1 increase in the kit price was associated with a disutility (U) of --2.017; (2) door-to-door kit delivery (U = +1.029) relative to collection from public/outreach clinic; (3) telephone helpline for pretest support relative to in-person or no support (U = +0.415); (4) distributors from own/local village (U = +0.145) versus those from external communities. Participants who had never HIV tested valued phone helpines more than those previously tested. The strongest LCT preferences were: (1) immediate antiretroviral therapy (ART) availability: U = +0.614 and U = +1.052 for public and outreach clinics, respectively; (2) free services: a $1 user fee increase decreased utility at public (U = -0.381) and outreach clinics (U = -0.761); (3) proximity of clinic (U = -0.38 per hour walking). Participants reported willingness to link to either location; but never-testers were more averse to LCT. Simulations showed the importance of availability of ART: ART unavailability at public clinics would reduce LCT by 24%. Conclusions: Free HIVST distribution by local volunteers and immediately available ART were the strongest relative preferences identified. Accommodating LCT preferences, notably ensuring efficient provision of ART, could facilitate "resistant testers" to test while maximizing uptake of post-test services. Keywords: discrete choice experiments; HIV self-testing; HIV testing; Zimbabwe; HIV; preferences
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- 2019
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29. Re-reading of OraQuick HIV-1/2 rapid antibody test results: quality assurance implications for HIV self-testing programmes
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Watson, Victoria, Dacombe, Russell J., Williams, Christopher, Edwards, Thomas, Adams, Emily R., Johnson, Cheryl C., Mutseta, Miriam N., Corbett, Elizabeth L., Cowan, Frances M., Ayles, Helen, Hatzold, Karin, MacPherson, Peter, and Taegtmeyer, Miriam
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Diagnosis ,Usage ,Analysis ,HIV infections -- Diagnosis ,HIV tests -- Usage ,Health policy -- Analysis - Abstract
1 | INTRODUCTION HIV self-testing (HIVST) is being scaled-up using a variety of distribution models throughout Africa, the Americas, Asia and Europe [1-4]. No clear monitoring and evaluation or external [...], Introduction: Scale-up of HIV self-testing (HIVST) will play a key role in meeting the United Nation's 90-90-90 targets. Delayed re-reading of used HIVST devices has been used by early implementation studies to validate the performance of self-test kits and to estimate HIV positivity among self-testers. We investigated the stability of results on used devices under controlled conditions to assess its potential as a quality assurance approach for HIVST scale-up. Methods: 444 OraQuick[R] HIV-1/2 rapid antibody tests were conducted using commercial plasma from two HIV-positive donors and HIV-negative plasma (high-reactive n = 148, weak-reactive n = 148 and non-reactive n = 148) and incubated them for six months under four conditions (combinations of high and low temperatures and humidity). Devices were reread daily for one week, weekly for one subsequent month and then once a month by independent readers unaware of the previous results. We used multistage transition models to investigate rates of change in device results, and between storage conditions. Results and discussion: There was a high incidence of device instability. Forty-three (29%) of 148 initially non-reactive results became false weak-reactive results. These changes were observed across all incubation conditions, the earliest on Day 4 (n = 9 kits). No initially HIV-reactive results changed to a non-reactive result. There were no significant associations between storage conditions and hazard of results transition. We observed substantial statistical agreement between independent re-readers over time (agreement range: 0.74 to 0.96). Conclusions: Delayed re-reading of used OraQuick[R] HIV-1/2 rapid antibody tests is not currently a valid methodologica approach to quality assurance and monitoring as we observed a high incidence (29%) of true non-reactive tests changing to false weak-reactive and therefore its use may overestimate true HIV positivity. Keywords: HIV self-testing; Quality assurance; Delayed re-reading; Visual stability; False reactive; Misdiagnosis; HIV testing
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- 2019
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30. Regulation of HIV self-testing in Malawi, Zambia and Zimbabwe: a qualitative study with key stakeholders
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Dacombe, Russell J., Watson, Victoria, Nyirenda, Lot, Madanhire, Claudius, Simwinga, Musonda, Chepuka, Lignet, Johnson, Cheryl C., Corbett, Elizabeth L., Hatzold, Karin, and Taegtmeyer, Miriam
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Diagnosis ,Usage ,HIV infections -- Diagnosis ,HIV tests -- Usage - Abstract
1 | INTRODUCTION The World Health Organization (WHO) defines HIV self-testing (HIVST) as 'a process in which a person collects his or her own specimen (oral fluid or blood) and [...], Introduction: HIV self-testing (HIVST) is being introduced as a new way for more undiagnosed people to know their HIV status. As countries start to implement HIVST, assuring the quality and regulating in vitro diagnostics, including HIVST, are essential. We aimed to document the emerging regulatory landscape and perceptions of key stakeholders involved in HIVST policy and regulation prior to implementation in three low- and middle-income countries. Methods: Between April and August 2016, we conducted semi-structured interviews in Malawi, Zambia and Zimbabwe to understand the relationships between different stakeholders on their perceptions of current and future HIVST regulation and the potential impact on implementation. We purposively sampled and interviewed 66 national-level key stakeholders from the Ministry of Health and the regulatory, laboratory, logistical, donor and non-governmental sectors. We used a thematic approach to analysis with an inductively developed common coding framework to allow inter-country comparison of emerging themes. Results: In all countries, the national reference laboratory was monitoring the quality of HIVST kits entering the public sector. In Malawi, there was no legal mandate to regulate medical devices, in Zambia one regulatory body with a clear mandate had started developing regulations and in Zimbabwe the mandate to regulate was overlapping between two bodies. Stakeholders indicated that they had a poor understanding of the process and requirements for HIVST regulation, as well as lack of clarity and coordination between organizational roles. The need for good collaboration between sectors, a strong post-market surveilance model for HIVST and technical assistance to develop regulators capacity was noted as priorities. Key informants identified technical working groups as a potential way collaboration could be improved upon to accelerate the regulation of HIVST. Conclusion: Regulation of in vitro diagnostic devices, including HIVST, is now being recognized as important by regulators after a regional focus on pharmaceuticals. HIVST is providing an opportunity for each country to develop similar regulations to others in the region leading to a more coherent regulatory environment for the introduction of new devices. Keywords: quality assurance; policy; in vitro diagnostics; post market; implementation; harmonization
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- 2019
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31. Ability to understand and correctly follow HIV self-test kit instructions for use: applying the cognitive interview technique in Malawi and Zambia
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Simwinga, Musonda, Kumwenda, Moses K., Dacombe, Russell J., Kayira, Lusungu, Muzumara, Agness, Johnson, Cheryl C., Indravudh, Pitchaya, Sibanda, Euphemia L., Nyirenda, Lot, Hatzold, Karin, Corbett, Elizabeth L., Ayles, Helen, and Taegtmeyer, Miriam
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Diagnosis ,Usage ,HIV infections -- Diagnosis ,HIV tests -- Usage ,Medical research - Abstract
1 | INTRODUCTION HIV self-testing (HIVST) is increasingly being introduced as a testing approach recommended by the World Health Organization (WHO) to reach those who may not otherwise test [1,2]. [...], Introduction: The ability to achieve an accurate test result and interpret it correctly is critical to the impact and effectiveness of HIV self-testing (HIVST). Simple and easy-to-use devices, instructions for use (IFU) and other support tools have been shown to be key to good performance in sub-Saharan Africa and may be highly contextual. The objective of this study was to explore the utility of cognitive interviewing in optimizing the local understanding of manufacturers' IFUs to achieve an accurate HIVST result. Methods: Functionally literate and antiretroviral therapy-naive participants were purposefully selected between May 2016 and June 2017 to represent intended users of HIV self-tests from urban and rural areas in Malawi and Zambia. Participants were asked to follow IFUs for HIVST. We then conducted cognitive interviews and observed participants while they attempted to complete the HIVST steps using a structured guide, which mirrored the steps in the IFU. Qualitative data were analysed using a thematic approach. Results: Of a total of 61 participants, many successfully performed most steps in the IFU. Some had difficulties in understanding these and made errors, which could have led to incorrect test results, such as incorrect use of buffer and reading the results prematurely. Participants with lower levels of literacy and inexperience with standard pictorial images were more likely to struggle with IFUs. Difficulties tended to be more pronounced among those in rural settings. Ambiguous terms and translations in the IFU, unfamiliar images and symbols, and unclear order of the steps to be followed were most commonly linked to errors and lower comprehension among participants. Feedback was provided to the manufacturer on the findings, which resulted in further optimization of IFUs. Conclusions: Cognitive interviewing identifies local difficulties in conducting HIVST from manufacturer-translated IFUs. It is a useful and practical methodology to optimize IFUs and make them more understandable. Keywords: HIV self-test; performance; in vitro diagnosis; instructions for use; Zambia; Malawi
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- 2019
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32. The Cost of Not Retesting: Human Immunodeficiency Virus Misdiagnosis in the Antiretroviral Therapy "Test-and-Offer" Era
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Eaton, Jeffrey W., Johnson, Cheryl C., and Gregson, Simon
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- 2017
33. Comparing the effects of HIV self-testing to standard HIV testing for key populations: a systematic review and meta-analysis
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Witzel, T. Charles, Eshun-Wilson, Ingrid, Jamil, Muhammad S., Tilouche, Nerissa, Figueroa, Carmen, Johnson, Cheryl C., Reid, David, Baggaley, Rachel, Siegfried, Nandi, Burns, Fiona M., Rodger, Alison J., and Weatherburn, Peter
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- 2020
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34. Accuracy of and preferences for blood-based versus oral-fluid-based HIV self-testing in Malawi: a cross-sectional study.
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O'Reilly, Ailva, Mavhu, Webster, Neuman, Melissa, Kumwenda, Moses K., Johnson, Cheryl C., Sinjani, George, Indravudh, Pitchaya, Choko, Augustin, Hatzold, Karin, and Corbett, Elizabeth L.
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HIV testing kits ,PATIENT self-monitoring ,CROSS-sectional method ,DIAGNOSIS of HIV infections ,BLOOD products ,RURAL health clinics - Abstract
Background: HIV self-testing (HIVST) can use either oral-fluid or blood-based tests. Studies have shown strong preferences for self-testing compared to facility-based services. Despite availability of low-cost blood-based HIVST options, to date, HIVST implementation in sub-Saharan Africa has largely been oral-fluid-based. We investigated whether users preferred blood-based (i.e. using blood sample derived from a finger prick) or oral fluid-based HIVST in rural and urban Malawi. Methods: At clinics providing HIV testing services (n = 2 urban; n = 2 rural), participants completed a semi-structured questionnaire capturing sociodemographic data before choosing to test using oral-fluid-based HVST, blood-based HIVST or provider-delivered testing. They also completed a self-administered questionnaire afterwards, followed by a confirmatory test using the national algorithm then appropriate referral. We used simple and multivariable logistic regression to identify factors associated with preference for oral-fluid or blood-based HIVST. Results: July to October 2018, N = 691 participants enrolled in this study. Given the choice, 98.4% (680/691) selected HIVST over provider-delivered testing. Of 680 opting for HIVST, 416 (61.2%) chose oral-fluid-based HIVST, 264 (38.8%) chose blood-based HIVST and 99.1% (674/680) reported their results appropriately. Self-testers who opted for blood-based HIVST were more likely to be male (50.3% men vs. 29.6% women, p < 0.001), attending an urban facility (43% urban vs. 34.6% rural, p = 0.025) and regular salary-earners (49.5% regular vs. 36.8% non-regular, p = 0.012). After adjustment, only sex was found to be associated with choice of self-test (adjusted OR 0.43 (95%CI: 0.3–0.61); p-value < 0.001). Among 264 reporting blood-based HIVST results, 11 (4.2%) were HIV-positive. Blood-based HIVST had sensitivity of 100% (95% CI: 71.5–100%) and specificity of 99.6% (95% CI: 97.6–100%), with 20 (7.6%) invalid results. Among 416 reporting oral-fluid-based HIVST results 18 (4.3%) were HIV-positive. Oral-fluid-based HIVST had sensitivity of 88.9% (95% CI: 65.3–98.6%) and specificity of 98.7% (95% CI: 97.1–99.6%), with no invalid results. Conclusions: Offering both blood-based and oral-fluid-based HIVST resulted in high uptake when compared directly with provider-delivered testing. Both types of self-testing achieved high accuracy among users provided with a pre-test demonstration beforehand. Policymakers and donors need to adequately plan and budget for the sensitisation and support needed to optimise the introduction of new quality-assured blood-based HIVST products. [ABSTRACT FROM AUTHOR]
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- 2024
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35. Lessons learned from implementation of four HIV self-testing (HIVST) distribution models in Zambia: applying the Consolidated Framework for Implementation Research to understand impact of contextual factors on implementation.
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Simwinga, Musonda, Gwanu, Lwiindi, Hensen, Bernadette, Sigande, Lucheka, Mainga, Mwami, Phiri, Thokozile, Mwanza, Eliphas, Kabumbu, Mutale, Mulubwa, Chama, Mwenge, Lawrence, Bwalya, Chiti, Kumwenda, Moses, Mubanga, Ellen, Mee, Paul, Johnson, Cheryl C., Corbett, Elizabeth L., Hatzold, Karin, Neuman, Melissa, Ayles, Helen, and Taegtmeyer, Miriam
- Abstract
Background Although Zambia has integrated HIV-self-testing (HIVST) into its Human Immunodefciency Virus (HIV) regulatory frameworks, few best practices to optimize the use of HIV self-testing to increase testing coverage have been documented. We conducted a prospective case study to understand contextual factors guiding implementation of four HIVST distribution models to inform scale-up in Zambia. Methods We used the qualitative case study method to explore user and provider experiences with four HIVST distribution models (two secondary distribution models in Antenatal Care (ANC) and Antiretroviral Therapy (ART) clinics, community-led, and workplace) to understand factors infuencing HIVST distribution. Participants were purposefully selected based on their participation in HIVST and on their ability to provide rich contextual experience of the distribution models. Data were collected using observations (n=31), group discussions (n=10), and in-depth interviews (n=77). Data were analyzed using the thematic approach and aligned to the four Consolidated Framework for Implementation Research (CFIR) domains. Results Implementation of the four distribution models was infuenced by an interplay of outer and inner setting factors. Inadequate compensation and incentives for distributors may have contributed to distributor attrition in the community-led and workplace HIVST models. Stockouts, experienced at the start of implementation in the secondary-distribution and community-led distribution models often disrupted distribution. The existence of policy and practices aided integration of HIVST in the workplace. External factors complimented internal factors for successful implementation. For instance, despite distributor attrition leading to excessive workload, distributors often multi-tasked to keep up with demand for kits, even though distribution points were geographically widespread in the workplace, and to a less extent in the community-led models. Use of existing communication platforms such as lunchtime and safety meetings to promote and distribute kits, peers to support distributors, reduction in trips by distributors to replenish stocks, increase in monetary incentives and reorganisation of stakeholder roles proved to be good adaptations. Conclusion HIVST distribution was infuenced by a combination of contextual factors in variable ways. Understanding how the factors interacted in real world settings informed adaptations to implementation devised to minimize disruptions to distribution. [ABSTRACT FROM AUTHOR]
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- 2024
36. Using HIV self-testing to increase the affordability of community-based HIV testing services
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d’Elbée, Marc, Makhetha, Molemo Charles, Jubilee, Makhahliso, Taole, Matee, Nkomo, Cyril, Machinda, Albert, Tlhomola, Mphotleng, Sande, Linda A., Gomez Guillen, Gabriela B., Corbett, Elizabeth L., Johnson, Cheryl C., Hatzold, Karin, Meyer-Rath, Gesine, and Terris-Prestholt, Fern
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- 2020
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37. Challenges in measurement of linkage following HIV self-testing: examples from the STAR Project
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Neuman, Melissa, Taegtmeyer, Miriam, Hatzold, Karin, Johnson, Cheryl C., Weiss, Helen A., and Fielding, Katherine
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Care and treatment ,Usage ,Analysis ,HIV infections -- Care and treatment ,HIV tests -- Usage ,Medical care -- Analysis - Abstract
Knowledge of HIV status through HIV testing constitutes the first step towards HIV treatment and prevention services. HIV self-testing (HIVST), whereby individuals collect their own specimen, conduct their own test [...]
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- 2019
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38. Effect of community-led delivery of HIV self-testing on HIV testing and antiretroviral therapy initiation in Malawi: A cluster-randomised trial
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Indravudh, Pitchaya P., Fielding, Katherine, Kumwenda, Moses K., Nzawa, Rebecca, Chilongosi, Richard, Desmond, Nicola, Nyirenda, Rose, Neuman, Melissa, Johnson, Cheryl C., Baggaley, Rachel, Hatzold, Karin, Terris-Prestholt, Fern, and Corbett, Elizabeth L.
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Statistics ,Evaluation ,Methods ,Highly active antiretroviral therapy -- Methods -- Statistics ,HIV tests -- Methods -- Statistics ,Rural health services -- Evaluation -- Statistics ,Community health services -- Evaluation -- Statistics ,HIV testing -- Methods -- Statistics - Abstract
Author(s): Pitchaya P. Indravudh 1,2,*, Katherine Fielding 3,4, Moses K. Kumwenda 2, Rebecca Nzawa 2, Richard Chilongosi 5, Nicola Desmond 2,6, Rose Nyirenda 7, Melissa Neuman 3, Cheryl C. Johnson [...], Background Undiagnosed HIV infection remains substantial in key population subgroups including adolescents, older adults, and men, driving ongoing transmission in sub-Saharan Africa. We evaluated the impact, safety, and costs of community-led delivery of HIV self-testing (HIVST), aiming to increase HIV testing in underserved subgroups and stimulate demand for antiretroviral therapy (ART). Methods and findings This cluster-randomised trial, conducted between October 2018 and July 2019, used restricted randomisation (1:1) to allocate 30 group village head clusters in Mangochi district, Malawi to the community-led HIVST intervention in addition to the standard of care (SOC) or the SOC alone. The intervention involved mobilising community health groups to lead the design and implementation of 7-day HIVST campaigns, with cluster residents ([greater than or equal to]15 years) eligible for HIVST. The primary outcome compared lifetime HIV testing among adolescents (15 to 19 years) between arms. Secondary outcomes compared: recent HIV testing (in the last 3 months) among older adults ([greater than or equal to]40 years) and men; cumulative 6-month incidence of ART initiation per 100,000 population; knowledge of the preventive benefits of HIV treatment; and HIV testing stigma. Outcomes were measured through a post-intervention survey and at neighboring health facilities. Analysis used intention-to-treat for cluster-level outcomes. Community health groups delivered 24,316 oral fluid-based HIVST kits. The survey included 90.2% (3,960/4,388) of listed participants in the 15 community-led HIVST clusters and 89.2% (3,920/4,394) of listed participants in the 15 SOC clusters. Overall, the proportion of men was 39.0% (3,072/7,880). Most participants obtained primary-level education or below, were married, and reported a sexual partner. Lifetime HIV testing among adolescents was higher in the community-led HIVST arm (84.6%, 770/910) than the SOC arm (67.1%, 582/867; adjusted risk difference [RD] 15.2%, 95% CI 7.5% to 22.9%; p < 0.001), especially among 15 to 17 year olds and boys. Recent testing among older adults was also higher in the community-led HIVST arm (74.5%, 869/1,166) than the SOC arm (31.5%, 350/1,111; adjusted RD 42.1%, 95% CI 34.9% to 49.4%; p < 0.001). Similarly, the proportions of recently tested men were 74.6% (1,177/1,577) and 33.9% (507/1,495) in the community-led HIVST and SOC arms, respectively (adjusted RD 40.2%, 95% CI 32.9% to 47.4%; p < 0.001). Knowledge of HIV treatment benefits and HIV testing stigma showed no differences between arms. Cumulative incidence of ART initiation was respectively 305.3 and 226.1 per 100,000 population in the community-led HIVST and SOC arms (RD 72.3, 95% CI -36.2 to 180.8; p = 0.18). In post hoc analysis, ART initiations in the 3-month post-intervention period were higher in the community-led HIVST arm than the SOC arm (RD 97.7, 95% CI 33.4 to 162.1; p = 0.004). HIVST uptake was 74.7% (2,956/3,960), with few adverse events (0.6%, 18/2,955) and at US$5.70 per HIVST kit distributed. The main limitations include the use of self-reported HIV testing outcomes and lack of baseline measurement for the primary outcome. Conclusions In this study, we found that community-led HIVST was effective, safe, and affordable, with population impact and coverage rapidly realised at low cost. This approach could enable community HIV testing in high HIV prevalence settings and demonstrates potential for economies of scale and scope. Trial registration Clinicaltrials.gov NCT03541382.
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- 2021
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39. Community-led delivery of HIV self-testing to improve HIV testing, ART initiation and broader social outcomes in rural Malawi: study protocol for a cluster-randomised trial
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Indravudh, Pitchaya P., Fielding, Katherine, Kumwenda, Moses K., Nzawa, Rebecca, Chilongosi, Richard, Desmond, Nicola, Nyirenda, Rose, Johnson, Cheryl C., Baggaley, Rachel C., Hatzold, Karin, Terris-Prestholt, Fern, and Corbett, Elizabeth L.
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- 2019
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40. To err is human, to correct is public health: a systematic review examining poor quality testing and misdiagnosis of HIV status
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Johnson, Cheryl C., Fonner, Virginia, Sands, Anita, Ford, Nathan, Obermeyer, Carla Mahklouf, Tsui, Sharon, Wong, Vincent, and Baggaley, Rachel
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World Health Organization -- Standards ,Diagnosis ,Care and treatment ,Standards ,Analysis ,Usage ,Research ,Health aspects ,Diagnostic errors -- Analysis ,HIV tests -- Quality management -- Usage -- Health aspects ,Public health -- Analysis ,HIV -- Research -- Diagnosis -- Care and treatment - Abstract
Introduction: In accordance with global testing and treatment targets, many countries are seeking ways to reach the '90-9090' goals, starting with diagnosing 90% of all people with HIV. Quality HIV [...]
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- 2017
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41. A public health approach to addressing and preventing misdiagnosis in the scale-up of HIV rapid testing programmes
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Johnson, Cheryl C., Dalal, Shona, Baggaley, Rachel, and Taegtmeyer, Miriam
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World Health Organization -- Standards ,Diagnosis ,Care and treatment ,Prevention ,Standards ,Usage ,Analysis ,Research ,Health aspects ,Diagnostic errors -- Analysis ,HIV tests -- Usage -- Health aspects ,Public health -- Analysis ,HIV -- Care and treatment -- Research -- Diagnosis -- Prevention - Abstract
Keywords: HIV; diagnostic; rapid diagnostic test; test; quality; misdiagnosis; misclassification Introduction The global impact of the scale-up HIV testing and treatment has been impressive. In 2015, approximately 60% of people [...]
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- 2017
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42. Examining the effects of HIV self-testing compared to standard HIV testing services: a systematic review and meta-analysis
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Johnson, Cheryl C., Kennedy, Caitlin, Fonner, Virginia, Siegfried, Nandi, Dalal, Shona, Sands, Anita, and Baggaley, Rachel
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World Health Organization -- Powers and duties -- Standards ,Diagnosis ,Powers and duties ,Standards ,Analysis ,Usage ,Research ,HIV infections -- Diagnosis -- Research ,HIV tests -- Standards -- Analysis -- Usage - Abstract
Introduction Global scale-up of HIV testing services (HTS) has been significant. From 2010 to 2014, more than 600 million people received HTS in 122 low- and middle-income countries [1]. This [...], Introduction: HIV self-testing (HIVST) is a discreet and convenient way to reach people with HIV who do not know their status, including many who may not otherwise test. To inform World Health Organization (WHO) guidance, we assessed the effect of HIVST on uptake and frequency of testing, as well as identification of HIV-positive persons, linkage to care, social harm, and risk behaviour. Methods: We systematically searched for studies comparing HIVST to standard HIV testing until 1 June 2016. Meta-analyses of studies reporting comparable outcomes were conducted using a random-effects model for relative risks (RR) and 95% confidence intervals. The quality of evidence was evaluated using GRADE. Results: After screening 638 citations, we identified five randomized controlled trials (RCTs) comparing HIVST to standard HIV testing services among 4,145 total participants from four countries. All offered free oral-fluid rapid tests for HIVST and were among men. Meta-analysis of three RCTs showed HIVST doubled uptake of testing among men (RR = 2.12; 95% CI: 1.51, 2.98). Meta-analysis of two RCTs among men who have sex with men showed frequency of testing nearly doubled (Rate ratio = 1.88; 95% CI: 1.17; 3.01), resulting in two more tests in a 12-15-month period (Mean difference = 2.13; 95% CI: 1.59, 2.66). Meta-analysis of two RCTs showed HIVST also doubled the likelihood of an HIV-positive diagnosis (RR = 2.02; 95% CI: 0.37, 10.76, 5.32). Across all RCTs, there was no indication of harm attributable to HIVST and potential increases in risk-taking behaviour appeared to be minimal. Conclusions: HIVST is associated with increased uptake and frequency of testing in RCTs. Such increases, particularly among those at risk who may not otherwise test, will likely identify more HIV-positive individuals as compared to standard testing services alone. However, further research on how to support linkage to confirmatory testing, prevention, treatment and care services is needed. WHO now recommends HIVST as an additional HIV testing approach. Keywords: HIV/AIDS; HIV test; HIV self-test; public health
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- 2017
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43. Preferences for linkage to HIV care services following a reactive self-test: discrete choice experiments in Malawi and Zambia
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d’Elbée, Marc, Indravudh, Pitchaya P., Mwenge, Lawrence, Kumwenda, Moses M., Simwinga, Musonda, Choko, Augustine T., Hensen, Bernadette, Neuman, Melissa, Ong, Jason J., Sibanda, Euphemia L., Johnson, Cheryl C., Hatzold, Karin, Cowan, Frances M., Ayles, Helen, Corbett, Elizabeth L., and Terris-Prestholt, Fern
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- 2018
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44. ‘I will choose when to test, where I want to test’: investigating young peopleʼs preferences for HIV self-testing in Malawi and Zimbabwe
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Indravudh, Pitchaya P., Sibanda, Euphemia L., d’Elbée, Marc, Kumwenda, Moses K., Ringwald, Beate, Maringwa, Galven, Simwinga, Musonda, Nyirenda, Lot J., Johnson, Cheryl C., Hatzold, Karin, Terris-Prestholt, Fern, and Taegtmeyer, Miriam
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- 2017
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45. Integrating assisted partner notification within HIV prevention service package for people who inject drugs in Pakistan
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Malik, Maimoona, Jamil, Muhammad S., Johnson, Cheryl C., Pasha, Muhammad S., Hermez, Joumana, and Qureshi, Salman Ul H.
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Prevention ,Social aspects ,Complications and side effects ,Methods ,HIV infections -- Prevention ,Intravenous drug abuse -- Complications and side effects -- Social aspects ,Contact tracing -- Methods ,HIV infection -- Prevention - Abstract
With 20,000 new HIV infections in 2017, Pakistan has the second fastest growing HIV epidemic in Asia Pacific. Several HIV outbreaks have occurred in the past years and the most [...]
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- 2019
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46. The power of partners: positively engaging networks of people with HIV in testing, treatment and prevention
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Katz, David A., Wong, Vincent J., Medley, Amy M., Johnson, Cheryl C., Cherutich, Peter K., Green, Kimberly E., Huong, Phan, and Baggaley, Rachel C.
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Social aspects ,Evaluation ,Methods ,HIV tests -- Social aspects -- Methods ,Practice guidelines (Medicine) -- Evaluation ,Health risk communication -- Evaluation ,Contact tracing -- Social aspects ,HIV testing -- Social aspects -- Methods - Abstract
When HIV diagnostic tests first became available in 1985, HIV testing was offered with caution. No treatment was available, prevention options were limited, and stigma and discrimination against people with [...]
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- 2019
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47. Community?led HIV testing services including HIV self?testing and assisted partner notification services in Vietnam: lessons from a pilot study in a concentrated epidemic setting
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Nguyen, Van Thi Thuy, Phan, Huong Tt, Kato, Masaya, Nguyen, Quang?Thong, Le Ai, Kim A., Vo, Son H., Thanh, Duong C., Baggaley, Rachel C., and Johnson, Cheryl C.
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Diagnosis ,Care and treatment ,Methods ,HIV infections -- Diagnosis -- Care and treatment ,Contact tracing -- Methods ,Public health administration -- Methods ,HIV infection -- Diagnosis -- Care and treatment - Abstract
Introduction In 2017, there were an estimated 250,000 people living with HIV (PLHIV) in Vietnam, a prevalence of 0.4% among adults aged 15 to 49 years. The majority of PLHIV [...], : Introduction: The HIV epidemic in Vietnam is concentrated in key populations and their partners ? people who inject drugs, men who have sex with men, sex workers and partners of people living with HIV. These groups have poor access to and uptake of conventional HIV testing services (HTS). To address this gap, lay provider? and self?testing and assisted partner notification (aPN) were introduced and delivered by the community. We explored the feasibility and effectiveness of implementing aPN as part of community testing services for key populations. Methods: Lay provider testing and self?testing was started in January 2017, and targeted key populations and their partners. Since July 2017, aPN was introduced. HTS was offered at drop?in houses or coffee shops in Thai Nguyen and Can Tho provinces. All self?testing was assisted and observed by peer educators. Both in?person and social network methods were used to mobilize key populations to test for HIV and offer HTS to partners of people living with HIV. Client?level data, including demographic information and self?reported risk behaviour, were collected on site by peer educators. Results: Between January 2017 and May 2018, 3978 persons from key populations were tested through community?led HTS; 66.7% were first?time testers. Of the 3978 clients, 3086 received HTS from a lay provider and 892 self?tested in the presence of a lay provider. Overall, 245 (6.2% of tested clients) had reactive results, 231 (94.3%) were confirmed to be HIV positive; 215/231 (93.1%) initiated antiretroviral therapy (ART). Of 231 adult HIV?positive clients, 186 (80.5%) were provided voluntary aPN, and 105 of their partners were contacted and received HTS. The ratio of partners who tested for HIV per index client was 0.56. Forty?four (41.9%) partners of index clients receiving HTS were diagnosed with HIV, 97.7% initiated ART during the study period. No social harm was identified or reported. Conclusions: Including aPN as part of community?led HTS for key populations and their partners is feasible and effective, particularly for reaching first?time testers and undiagnosed HIV clients. Scale?up of aPN within community?led HTS for key populations is essential for achieving the United Nations 90?90?90 targets in Vietnam.
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- 2019
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48. Secondary distribution of HIV self-test kits by HIV index and antenatal care clients: implementation and costing results from the STAR Initiative in South Africa.
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Zishiri, Vincent, Conserve, Donaldson F., Haile, Zelalem T., Corbett, Elizabeth, Hatzold, Karin, Meyer-Rath, Gesine, Matsimela, Katleho, Sande, Linda, d'Elbee, Marc, Terris-Prestholt, Fern, Johnson, Cheryl C., Chidarikire, Thato, Venter, Francois, and Majam, Mohammed
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HIV testing kits ,PRENATAL care ,PATIENT self-monitoring ,ANTIBODY titer ,HIV-positive persons - Abstract
Background: Partner-delivered HIV self-testing kits has previously been highlighted as a safe, acceptable and effective approach to reach men. However, less is known about its real-world implementation in reaching partners of people living with HIV. We evaluated programmatic implementation of partner-delivered self-testing through antenatal care (ANC) attendees and people newly diagnosed with HIV by assessing use, positivity, linkage and cost per kit distributed. Methods: Between April 2018 and December 2019, antenatal care (ANC) clinic attendees and people or those newly diagnosed with HIV clients across twelve clinics in three cities in South Africa were given HIVST kits (OraQuick Rapid HIV-1/2 Antibody Test, OraSure Technologies) to distribute to their sexual partners. A follow-up telephonic survey was administered to all prior consenting clients who were successfully reached by telephone to assess primary outcomes. Incremental economic costs of the implementation were estimated from the provider's perspective. Results: Fourteen thousand four hundred seventy-three HIVST kits were distributed – 10,319 (71%) to ANC clients for their male partner and 29% to people newly diagnosed with HIV for their partners. Of the 4,235 ANC clients successfully followed-up, 82.1% (3,475) reportedly offered HIVST kits to their male partner with 98.1% (3,409) accepting and 97.6% (3,328) using the kit. Among ANC partners self-testing, 159 (4.8%) reported reactive HIVST results, of which 127 (79.9%) received further testing; 116 (91.3%) were diagnosed with HIV and 114 (98.3%) initiated antiretroviral therapy (ART). Of the 1,649 people newly diagnosed with HIV successfully followed-up; 1,312 (79.6%) reportedly offered HIVST kits to their partners with 95.8% (1,257) of the partners accepting and 95.9% (1,206) reported that their partners used the kit. Among these index partners, 297 (24.6%) reported reactive HIVST results of which 261 (87.9%) received further testing; 260 (99.6%) were diagnosed with HIV and 258 (99.2%) initiated ART. The average cost per HIVST distributed in the three cities was US$7.90, US$11.98, and US$14.81, respectively. Conclusions: Partner-delivered HIVST in real world implementation was able to affordably reach many male partners of ANC attendees and index partners of people newly diagnosed with HIV in South Africa. Given recent COVID-19 related restrictions, partner-delivered HIVST provides an important strategy to maintain essential testing services. [ABSTRACT FROM AUTHOR]
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- 2023
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49. HIV self-testing alone or with additional interventions, including financial incentives, and linkage to care or prevention among male partners of antenatal care clinic attendees in Malawi: An adaptive multi-arm, multi-stage cluster randomised trial
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Choko, Augustine T., Corbett, Elizabeth L., Stallard, Nigel, Maheswaran, Hendramoorthy, Lepine, Aurelia, Johnson, Cheryl C., Sakala, Doreen, Kalua, Thokozani, Kumwenda, Moses, Hayes, Richard, and Fielding, Katherine
- Subjects
Access control ,Influence ,Forecasts and trends ,Market trend/market analysis ,Self care (Health) -- Forecasts and trends ,HIV tests -- Access control ,Medical care utilization -- Forecasts and trends ,Health behavior -- Influence ,HIV ,Antiretroviral agents ,Economic incentives ,Clinical trials ,Highly active antiretroviral therapy ,Circumcision ,Proxy ,Ambulatory care facilities - Abstract
Author(s): Augustine T. Choko 1,2,*, Elizabeth L. Corbett 1,3, Nigel Stallard 4, Hendramoorthy Maheswaran 5, Aurelia Lepine 6, Cheryl C. Johnson 6,7, Doreen Sakala 1, Thokozani Kalua 8, Moses Kumwenda [...], Background Conventional HIV testing services have been less comprehensive in reaching men than in reaching women globally, but HIV self-testing (HIVST) appears to be an acceptable alternative. Measurement of linkage to post-test services following HIVST remains the biggest challenge, yet is the biggest driver of cost-effectiveness. We investigated the impact of HIVST alone or with additional interventions on the uptake of testing and linkage to care or prevention among male partners of antenatal care clinic attendees in a novel adaptive trial. Methods and findings An adaptive multi-arm, 2-stage cluster randomised trial was conducted between 8 August 2016 and 30 June 2017, with antenatal care clinic (ANC) days (i.e., clusters of women attending on a single day) as the unit of randomisation. Recruitment was from Ndirande, Bangwe, and Zingwangwa primary health clinics in urban Blantyre, Malawi. Women attending an ANC for the first time for their current pregnancy (regardless of trimester), 18 years and older, with a primary male partner not known to be on ART were enrolled in the trial after giving consent. Randomisation was to either the standard of care (SOC; with a clinic invitation letter to the male partner) or 1 of 5 intervention arms: the first arm provided women with 2 HIVST kits for their partners; the second and third arms provided 2 HIVST kits along with a conditional fixed financial incentive of $3 or $10; the fourth arm provided 2 HIVST kits and a 10% chance of receiving $30 in a lottery; and the fifth arm provided 2 HIVST kits and a phone call reminder for the women's partners. The primary outcome was the proportion of male partners who were reported to have tested for HIV and linked into care or prevention within 28 days, with referral for antiretroviral therapy (ART) or circumcision accordingly. Women were interviewed at 28 days about partner testing and adverse events. Cluster-level summaries compared each intervention versus SOC using eligible women as the denominator (intention-to-treat). Risk ratios were adjusted for male partner testing history and recruitment clinic. A total of 2,349/3,137 (74.9%) women participated (71 ANC days), with a mean age of 24.8 years (SD: 5.4). The majority (2,201/2,233; 98.6%) of women were married, 254/2,107 (12.3%) were unable to read and write, and 1,505/2,247 (67.0%) were not employed. The mean age for male partners was 29.6 years (SD: 7.5), only 88/2,200 (4.0%) were unemployed, and 966/2,210 (43.7%) had never tested for HIV before. Women in the SOC arm reported that 17.4% (71/408) of their partners tested for HIV, whereas a much higher proportion of partners were reported to have tested for HIV in all intervention arms (87.0%-95.4%, p < 0.001 in all 5 intervention arms). As compared with those who tested in the SOC arm (geometric mean 13.0%), higher proportions of partners met the primary endpoint in the HIVST + $3 (geometric mean 40.9%, adjusted risk ratio [aRR] 3.01 [95% CI 1.63-5.57], p < 0.001), HIVST + $10 (51.7%, aRR 3.72 [95% CI 1.85-7.48], p < 0.001), and phone reminder (22.3%, aRR 1.58 [95% CI 1.07-2.33], p = 0.021) arms. In contrast, there was no significant increase in partners meeting the primary endpoint in the HIVST alone (geometric mean 17.5%, aRR 1.45 [95% CI 0.99-2.13], p = 0.130) or lottery (18.6%, aRR 1.43 [95% CI 0.96-2.13], p = 0.211) arms. The lottery arm was dropped at interim analysis. Overall, 46 male partners were confirmed to be HIV positive, 42 (91.3%) of whom initiated ART within 28 days; 222 tested HIV negative and were not already circumcised, of whom 135 (60.8%) were circumcised as part of the trial. No serious adverse events were reported. Costs per male partner who attended the clinic with a confirmed HIV test result were $23.73 and $28.08 for the HIVST + $3 and HIVST + $10 arms, respectively. Notable limitations of the trial included the relatively small number of clusters randomised to each arm, proxy reporting of the male partner testing outcome, and being unable to evaluate retention in care. Conclusions In this study, the odds of men's linkage to care or prevention increased substantially using conditional fixed financial incentives plus partner-delivered HIVST; combinations were potentially affordable. Trial registration ISRCTN 18421340.
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- 2019
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50. Improved rapid diagnostic tests to detect syphilis and yaws: a systematic review and meta-analysis.
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Ying Zhang, Su MeiGoh, Mello, Maeve B., Baggaley, Rachel C., Teodora Wi, Johnson, Cheryl C., Asiedu, Kingsley B., Marks, Michael, Pham, Minh D., Fairley, Christopher K., Chow, Eric P. F., Mitjà, Oriol, Toskin, Igor, Ballard, Ronald C., Ong, Jason J., Zhang, Ying, Goh, Su Mei, and Wi, Teodora
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DIAGNOSIS of syphilis ,RESEARCH funding ,META-analysis ,ROUTINE diagnostic tests ,FERRANS & Powers Quality of Life Index ,SYSTEMATIC reviews ,YAWS ,SENSITIVITY & specificity (Statistics) - Abstract
Background: Current rapid tests for syphilis and yaws can detect treponemal and non-treponemal antibodies. We aimed to critically appraise the literature for rapid diagnostic tests (RDTs) which can better distinguish an active infection of syphilis or yaws.Methods: We conducted a systematic review and meta-analysis, searching five databases between January 2010 and October 2021 (with an update in July 2022). A generalised linear mixed model was used to conduct a bivariate meta-analysis for the pooled sensitivity and specificity. Heterogeneity was assessed using the I2 statistic. We used the Quality Assessment of Diagnostic Accuracy Studies (QUADAS) to assess the risk of bias and Grading of Recommendations, Assessment, Development and Evaluations (GRADE) to evaluate the certainty of evidence.Results: We included 17 studies for meta-analyses. For syphilis, the pooled sensitivity and specificity of the treponemal component were 0.93 (95% CI: 0.86 to 0.97) and 0.98 (95% CI: 0.96 to 0.99), respectively. For the non-treponemal component, the pooled sensitivity and specificity were 0.90 (95% CI: 0.82 to 0.95) and 0.97 (95% CI: 0.92 to 0.99), respectively. For yaws, the pooled sensitivity and specificity of the treponemal component were 0.86 (95% CI: 0.66 to 0.95) and 0.97 (95% CI: 0.94 to 0.99), respectively. For the non-treponemal component, the pooled sensitivity and specificity were 0.80 (95% CI: 0.55 to 0.93) and 0.96 (95% CI: 0.92 to 0.98), respectively.Conclusions: RDTs that can differentiate between active and previously treated infections could optimise management by providing same-day treatment and reducing unnecessary treatment.Prospero Registration Number: CRD42021279587. [ABSTRACT FROM AUTHOR]- Published
- 2022
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- View/download PDF
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