190 results on '"Harling G"'
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2. Two new species of Jungia (Compositae) from Peru
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Harling, G and BioStor
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- 1992
3. Reaching the 'first 95': a cross-country analysis of HIV self-testing in 177,572 people in nine countries in sub-Saharan Africa
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van Empel, E., De Vlieg, R.A., Marcus, M.E., Harling, G., Kahn, K., Baarnighausen, T.W., Choko, A.T., Montana, L., and Manne-Goehler, J.
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Medical care -- Utilization ,HIV testing -- Surveys ,Health literacy -- Surveys ,Health - Abstract
Background: HIV self-testing (HIVST) offers a promising approach to increase diagnosis of HIV and advance progress towards the UNAIDS 95-95-95 targets. We aimed to understand patterns of awareness and utilization [...]
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- 2021
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4. The association of exposure to DREAMS combination HIV prevention on sexually acquiring or transmitting HIV amongst adolescent girls and young women living in rural South Africa: a cohort study
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Shahmanesh, M., Mthiyane, N., Baisley, K., Zuma, T., Okesola, N., Dreyer, J., Herbst, C., Smit, T., Danaviah, S., McGrath, N., Harling, G., Sherr, L., Floyd, S., Birdthistle, I., Seeley, J., and Chimbindi, N.
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Sexually transmitted diseases -- Statistics -- Risk factors -- Prevention ,Rural women -- Statistics -- Care and treatment ,Young women -- Statistics -- Care and treatment ,HIV infection -- Statistics -- Risk factors -- Prevention ,Health - Abstract
Background: We investigate how the risk of sexually acquiring or transmitting HIV in adolescent girls and young women (AGYW) changed following the real-world implementation of DREAMS (Determined, Resilient, Empowered, AIDS [...]
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- 2021
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5. Peer-distributed HIV self-test kits to increase demand for HIV prevention and care services in rural KwaZulu-Natal, South Africa: a three-armed cluster-randomised trial comparing social-networks versus direct delivery
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Shahmanesh, M., Mthiyane, N., Herbst, C., Adeagbo, O., Neuman, M., Mee, P., Dreyer, J., Chimbindi, N., Smit, T., Okesola, N., Zuma, T., Harling, G., Mcgrath, N., Seeley, J., and Cowan, F.M.
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Self-care, Health -- Methods ,Medical testing products -- Usage ,Public health administration -- Evaluation ,HIV infection -- Prevention ,Health - Abstract
Background: HIV elimination in South Africa calls for innovative approaches. We investigated HIV self-testing (HIVST) for increasing demand for HIV care and prevention services, comparing two peer-distribution approaches (direct distribution and an incentivized social-network approach) against peer-navigators providing information and referrals only. Methods: Restricted randomisation (1:1:1) allocated 24 peer-navigator pairs in rural Kwa-Zulu Natal into: (1) incentivized-peer-networks (IPN): peer-navigators recruited 'seeds' to distribute 5 packs to 18 to 30 year olds within their social networks. Packs contained 2 HIVST kits (OraQuick) and standard of care (SOC) materials. 'Seeds' received 20 Rand (US$1.5) for each recipient who went on to distribute packs themselves; (2) peer-navigator-distribution (PND): peer-navigators distributed HIVST packs and SOC materials directly; (3) SOC: peer-navigators distributed barcoded clinic referral slips and sexual health information promoting HIV testing, pre-exposure prophylaxis (PrEP) and antiretroviral therapy (ART). PrEP/ART linkage rates were defined as numbers screened for PrEP eligibility or starting ART within 90 days of referral slip distribution per peer-navigator outreach month (pnm). The primary outcome compared PrEP/ART linkage rates between arms for women aged 18 to 24 years. Secondary outcomes included linkage rates for youth (18 to 30 years). Intention to treat analysis was used. Investigators and statisticans were blinded to allocation. Results: Between March and December 2019, 7563 (2055 IPN, 2069 PND, 2539 SOC) packs were distributed during 144 peer-navigator outreach months, with 272 young adults linked to PrEP/ART (1.9/pnm). Linkage rates for women aged 18 to 24 years were lower for IPN (n = 26, 0.54/pnm) than PND (n = 45, 0.80/pnm) and SOC n = 49, 0.85/pnm), although not significantly so (rate ratios [RR] 0.68, 95% CI 0.28 to 1.66 and 0.64, 95% CI 0.38 to 2.36, respectively). Adding HIVST kits to peer-navigator distribution (PND vs SOC) did not change linkage rates (RR 0.95, 95% CI 0.38 to 2.36). Youth (18 to 30 years), results were similar but with stronger evidence of lower linkage rates (0.88/pnm) for IPN than PND (2.11/pnm, RR 0.42, 95% CI 0.18 to 0.98) and SOC (2.07/pnm, RR 0.42 95% CI 0.18 to 1.02). Conclusions: Peer-based HIVST distribution reached large numbers of young men and women, but did not increase demand for PrEP/ART, unless combined with peer-navigator PrEP/ART promotion. Incentivized peer network models resulted in fewer linkages compared to direct peer-navigator mobilization with or without HIVSTs. Registration: NCT03751826., OA21.04 M. Shahmanesh (1); N. Mthiyane (2); C. Herbst (2); O. Adeagbo (2); M. Neuman (3); P. Mee (3); J. Dreyer (2); N. Chimbindi (2); T. Smit (2); N. Okesola [...]
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- 2021
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6. Cyclanthaceae
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Harling, G., Wilder, G. J., Eriksson, R., and Kubitzki, Klaus, editor
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- 1998
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7. P320 Sexual behaviours and Herpes Simplex Virus Type-2 Incidence and Prevalence among adolescent girls and young women in KwaZulu-Natal, South Africa
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Fong, W, primary, Mthiyane, N, additional, Harling, G, additional, Okesola, N, additional, Behuhuma, O, additional, Chimbindi, N, additional, Zuma, T, additional, Dreyer, J, additional, Herbst, C, additional, Smit, T, additional, Danaviah, S, additional, Sherr, L, additional, Seeley, J, additional, Floyd, S, additional, Birdthistle, I, additional, Shahmanesh, M, additional, and Sonnenberg, P, additional
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- 2021
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8. Protocol: Leveraging a demographic and health surveillance system for Covid-19 Surveillance in rural KwaZulu-Natal [version 2; peer review: 2 approved]
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Siedner, M., Harling, G., Derache, A., Smit, T., Khoza, T., Gunda, R., Mngomezulu, T., Gareta, D., Majozi, N., Ehlers, E., Dreyer, J., Nxumalo, S., Dayi, N., Ording-Jesperson, G., Ngwenya, N., Wong, E., Iwuji, C., Shahmanesh, M., Seeley, J., Oliveira, T., Ndung'u, T., Hanekom, W., and Herbst, K.
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lcsh:R ,lcsh:Medicine ,lcsh:Q ,lcsh:Science - Abstract
A coordinated system of disease surveillance will be critical to effectively control the coronavirus disease 2019 (Covid-19) pandemic. Such systems enable rapid detection and mapping of epidemics and inform allocation of scarce prevention and intervention resources. Although many lower- and middle-income settings lack infrastructure for optimal disease surveillance, health and demographic surveillance systems (HDSS) provide a unique opportunity for epidemic monitoring. This protocol describes a surveillance program at the Africa Health Research Institute’s Population Intervention Platform site in northern KwaZulu-Natal. The program leverages a longstanding HDSS in a rural, resource-limited setting with very high prevalence of HIV and tuberculosis to perform Covid-19 surveillance. Our primary aims include: describing the epidemiology of the Covid-19 epidemic in rural KwaZulu-Natal; determining the impact of the Covid-19 outbreak and non-pharmaceutical control interventions (NPI) on behaviour and wellbeing; determining the impact of HIV and tuberculosis on Covid-19 susceptibility; and using collected data to support the local public-sector health response. The program involves telephone-based interviews with over 20,000 households every four months, plus a sub-study calling 750 households every two weeks. Each call asks a household representative how the epidemic and NPI are affecting the household and conducts a Covid-19 risk screen for all resident members. Any individuals screening positive are invited to a clinical screen, potential test and referral to necessary care – conducted in-person near their home following careful risk minimization procedures. In this protocol we report the details of our cohort design, questionnaires, data and reporting structures, and standard operating procedures in hopes that our project can inform similar efforts elsewhere.
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- 2020
9. Limitations of the UNAIDS 90-90-90 metrics: a simulation-based comparison of cross-sectional and longitudinal metrics for the HIV care continuum
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Harling, G., Pettifor, A., Haber, N.A., Anglemyer, A., Salomon, J.A., Lippman, S.A., Lesko, C.R., Edwards, J.K., Chang, A.Y., Fox, M.P., Bor, J., and Powers, K.A.
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OBJECTIVES: The Joint United Nations Programme on HIV/AIDS (UNAIDS) 90-90-90 and other cross-sectional metrics can lead to potentially counterintuitive conclusions when used to evaluate health systems' performance. This study demonstrates how time and population dynamics impact UNAIDS 90-90-90 metrics in comparison with a longitudinal analogue. DESIGN: A simplified simulation representing a hypothetical population was used to estimate and compare inference from UNAIDS 90-90-90 metrics and longitudinal metrics based on Kaplan-Meier-estimated 2-year probability of transition between stages. METHODS: We simulated a large cohort over 15 years. Everyone started out at risk for HIV, and then transitioned through the HIV care continuum based on fixed daily probabilities of acquiring HIV, learning status, entering care, initiating antiretroviral therapy (ART), and becoming virally suppressed, or dying. We varied the probability of ART initiation over three five-year periods (low, high, and low). We repeated the simulation with an increased probability of death. RESULTS: The cross-sectional probability of being on ART among persons who were diagnosed responded relatively slowly to changes in the rate of ART initiation. Increases in ART initiation rates caused apparent declines in the cross-sectional probability of being virally suppressed among persons who had initiated ART, despite no changes in the rate of viral suppression. In some cases, higher mortality resulted in the cross-sectional metrics implying improved healthcare system performance. The longitudinal continuum was robust to these issues. CONCLUSION: The UNAIDS 90-90-90 care continuum may lead to incorrect inference when used to evaluate health systems performance. We recommend that evaluation of HIV care delivery include longitudinal care continuum metrics wherever possible.
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- 2020
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10. P3.97 A scoping review of prevalence, incidence and risk factors for hiv infection amongst young people in brazil
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Saffier, IP, primary, Kawa, H, additional, and Harling, G, additional
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- 2017
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11. Assessing the validity of respondents' reports of their partners' ages in a rural South African population-based cohort
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Harling, G., primary, Tanser, F., additional, Mutevedzi, T., additional, and Barnighausen, T., additional
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- 2015
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12. Time trends and regional differences in maternal mortality in China from 2000 to 2005
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Li S, Gerbase S, Michael J. Toole, van der Stuyft P, G H Law, Lefevre P, Pandit A, Feldman Mw, John M. Kaldor, De Koker P, Guilmoto Cz, Delva W, John Millan, Lupiwa T, Fleming P, Matthys F, Nair Kr, Foreit Kg, Ronsmans C, Harling G, Zhang Y, An Lin, John M. Murray, Gerland P, Weinreb A, Dias S, Andrew Page, Yanqiu G, Beck Ej, Peter Siba, Wilson Dp, Vallely A, Sinha S, and DeLay P
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China ,Time Factors ,Databases, Factual ,Cross-sectional study ,Voluntary counseling and testing ,Population ,Prevalence ,Developing country ,Acquired immunodeficiency syndrome (AIDS) ,Environmental health ,Medicine ,Humans ,Poisson Distribution ,education ,Birth Rate ,Health policy ,education.field_of_study ,Population statistics ,Geography ,business.industry ,Research ,Public Health, Environmental and Occupational Health ,medicine.disease ,Maternal Mortality ,Social Class ,Female ,business - Abstract
To examine trends and variations in maternal mortality in China between 2000 and 2005.We used Poisson regression analysis of data from the Chinese National Maternal and Child Health Routine Reporting System between 2000 and 2005 to identify time trends in the maternal mortality ratio (MMR) by province and region.The MMR declined by an average of 5% per year (crude relative risk, RR: 0.95; 95% confidence interval, CI: 0.94-0.97). There was no interaction between region and year (P = 0.2311). Mortality declined by 5% per year in the eastern region (crude RR: 0.95; 95% CI: 0.92-0.97), by 5% per year in the central region (crude RR; 0.95; 95% CI: 0.94-0.96), and by 4% per year in the western region (crude RR: 0.96; 95% CI: 0.94-0.98). The absolute difference in MMR between the western and eastern regions declined from 65.4 deaths per 100,000 live births in 2000 to 49.4 per 100,000 live births in 2005.China is making good progress towards achieving the fifth Millennium Development Goal, and there is no evidence of a widening gap between better-off and economically more deprived provinces.
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- 2008
13. National South African HIV prevalence estimates robust despite substantial test non-participation.
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Harling, G., Moyo, S., McGovern, M. E., Mabaso, M., Marra, G., Bärnighausen, T., and Rehle, T.
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- 2017
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14. Benkt Sparre (1918-1986)
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Harling, G.
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- 1987
15. Quantitative Photopyroelectric Out-Of-Phase Spectroscopy of Amorphous-Silicon Thin-Films Deposited on Crystalline Silicon
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Christofides, Constantinos, Mandelis, Andreas, ENGEL, A., Bisson, M., HARLING, G., and Christofides, Constantinos [0000-0002-4020-4660]
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SI - Abstract
A photopyroelectric spectrometer with real-time and(or) self-normalization capability was used for both conventional transmission and thermal-wave spectroscopic measurements of amorphous Si thin films, deposited on crystalline Si substrates. Optical-absorption-coefficient spectra were obtained from these measurements and the superior dynamic range of the out-of-phase (quadrature) photopyroelectric signal was established as the preferred measurement method, owing to its zero-background compensation capability. An extension of a photopyroelectric theoretical model was established and successfully tested in the determination of the optical absorption coefficient and the thermal diffusivity of the sample under investigation. Instrumental sensitivity limits of beta-t almost-equal-to 5 x 10(-3) were demonstrated. 69 3-4 317 323 PT: J TC: 11 J9: CAN J PHYS
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- 1991
16. Determinants of Mortality and Nondeath Losses from an Antiretroviral Treatment Service in South Africa: Implications for Program Evaluation
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Lawn, S. D., primary, Myer, L., additional, Harling, G., additional, Orrell, C., additional, Bekker, L.-G., additional, and Wood, R., additional
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- 2006
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17. A DRAM compiler for fully optimized memory instances.
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Harling, G.
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- 2001
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18. Counting the cost of not costing HIV health facilities accurately: pay now, or pay more later.
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Beck EJ, Avila C, Gerbase S, Harling G, De Lay P, Beck, Eduard J, Avila, Carlos, Gerbase, Sofia, Harling, Guy, and De Lay, Paul
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The HIV pandemic continues to be one of our greatest contemporary public health threats. Policy makers in many middle- and low-income countries are in the process of scaling up HIV prevention, treatment and care services in the context of a reduction in international HIV funding due to the global economic downturn. In order to scale up services that are sustainable in the long term, policy makers and implementers need to have access to robust and contemporary strategic information, including financial information on expenditure and cost, in order to be able to plan, implement, monitor and evaluate HIV services. A major problem in middle- and low-income countries continues to be a lack of basic information on the use of services, their cost, outcome and impact, while those few costing studies that have been performed were often not done in a standardized fashion. Some researchers handle this by transposing information from one country to another, developing mathematical or statistical models that rest on assumptions or information that may not be applicable, or using top-down costing methods that only provide global financial costs rather than using bottom-up ingredients-based costing. While these methods provide answers in the short term, countries should develop systematic data collection systems to store, transfer and produce robust and contemporary strategic financial information for stakeholders at local, sub-national and national levels. National aggregated information should act as the main source of financial data for international donors, agencies or other organizations involved with the global HIV response. This paper describes the financial information required by policy makers and other stakeholders to enable them to make evidence-informed decisions and reviews the quantity and quality of the financial information available, as indicated by cost studies published between 1981 and 2008. Among the lessons learned from reviewing these studies, a need was identified for providing countries with practical guidance to produce reliable and standardized costing data to monitor performance, as countries want to improve programmes and services, and have to demonstrate an efficient use of resources. Finally, the issues raised in this paper relate to the provision of all areas of healthcare in countries and it is going to be increasingly important to leverage the lessons learned from the HIV experience and use resources more effectively and efficiently to improve health systems in general. [ABSTRACT FROM AUTHOR]
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- 2012
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19. Standard measures are inadequate to monitor pediatric adherence in a resource-limited setting.
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Müller A, Jaspan H, Myer L, Lewis Hunter A, Harling G, Bekker L, and Orrell C
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- 2011
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20. Efficiency of interventions in HIV infection, 1994-2004.
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Harling G, Wood R, and Beck EJ
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The pandemic caused by HIV is one of the fastest growing health problems in the world today. Given the limited resources available to healthcare systems in many of the most heavily affected countries, it is crucially important to know the effectiveness, efficiency, equity, and acceptability of the interventions being implemented to contain this pandemic. This review examines the peer-reviewed literature on the efficiency of prevention, treatment and care interventions published between 1994 and 2004, findings reported by these studies, and methods used. The results varied by geographical setting and population studied.Some interventions were clearly cost effective including: prevention efforts and testing programs among vulnerable populations; blood screening in high-income nations and in sub-Saharan Africa; providing antiretroviral drugs and other interventions to expectant mothers and infants; treating certain opportunistic infections; and providing combination anti-retroviral therapy. However, most studies were set in the US, while only one in six dealt with sub-Saharan Africa. Few studies could be identified from continental Asia and none from Latin America. Three-quarters of all papers focused on hospital or primary care settings, with only prevention studies regularly evaluating community-based interventions. There is a paucity of primary data and thus, outcomes or costs were frequently modeled, using data from multiple sources in the absence of context-specific data.Establishing multicenter prospective monitoring systems on the use, cost and outcome of HIV service provision in middle and lower income countries may provide data to fill some of the large gaps which exist in the literature on interventions in these countries. The resulting gaps in the current scientific literature limits the ability for it to guide policy makers in those settings where the epidemic is most intense. Increased research in such settings and dissemination of their findings is urgently required, especially given the need for intensified prevention strategies to complement the scaling up of HIV treatment and care services in these countries. [ABSTRACT FROM AUTHOR]
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- 2005
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21. Partner Age-Disparity and HIV Incidence Risk for Older Women in Rural South Africa
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Harling, G., Newell, M.-L., Tanser, F., Bärnighausen, T., Harling, G., Newell, M.-L., Tanser, F., and Bärnighausen, T.
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While sexual partner age disparity is frequently considered as a potential risk factor for HIV among young women in Africa, no research has addressed this question among older women. Our aim was thus to determine whether sex partner age disparity was associated with subsequent HIV acquisition in women over 30 years of age. To achieve this aim we conducted a quantitative analysis of a population-based, open cohort of women in rural KwaZulu-Natal, South Africa (n = 1,737) using Cox proportional hazards models. As partner age rose, HIV acquisition risk fell significantly: compared to a same-aged partner, a 5-year older partner was associated with a one-third reduction [hazard ratio (HR) 0.63, 95 % CI 0.52–0.76] and a 10-year older partner with a one-half reduction (HR 0.48, 95 % CI 0.35–0.67) in acquisition risk. This result was neither confounded nor effect-modified by women’s age or socio-demographic factors. These findings suggest that existing HIV risk-reduction campaigns warning young women about partnering with older men may be inappropriate for older women. HIV prevention strategies interventions specifically tailored to older women are needed.
22. HIV seroconcordance among heterosexual couples in rural KwaZulu-Natal, South Africa: a population-based analysis
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Kim, H-Y, Harling, G, Vandormael, A, Tomita, A, Cuadros, D, Bärnighausen, T, Tanser, F, Kim, H-Y, Harling, G, Vandormael, A, Tomita, A, Cuadros, D, Bärnighausen, T, and Tanser, F
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Introduction High levels of HIV seroconcordance at the population level reduce the potential for effective HIV transmission. However, the level of HIV seroconcordance is largely unknown among heterosexual couples in sub‐Saharan Africa. We aimed to quantify the population level HIV seroconcordance in stable heterosexual couples in rural South Africa. Methods We followed adults (≥15 years old) using a population‐based, longitudinal and open surveillance system in KwaZulu‐Natal, South Africa, from 2003 to 2016. Sexual partnerships and HIV status were confirmed via household surveys and annual HIV surveillance. We calculated the proportions of HIV seroconcordance and serodiscordance in stable sexual partnerships and compared them to the expected proportions under the assumption of random mixing using individual‐based microsimulation models. Among unpartnered individuals, we estimated the incidence rates and hazard of sexual partnership formation with HIV‐positive or HIV‐negative partners by participants' own time‐varying HIV status. Competing risks survival regressions were fitted adjusting for sociodemographic and clinical factors. We also calculated Newman's assortativity coefficients. Results A total of 18,341 HIV‐negative and 11,361 HIV‐positive individuals contributed 154,469 person‐years (PY) of follow‐up. Overall, 28% of the participants were in stable sexual partnerships. Of the 677 newly formed stable sexual partnerships, 7.7% (95% CI: 5.8 to 10.0) were HIV‐positive seroconcordant (i.e. both individuals in the partnership were HIV‐positive), which was three times higher than the expected proportion (2.3%) in microsimulation models based on random mixing. The incidence rates of sexual partnership formation were 0.54/1000PY with HIV‐positive, 1.12/1000PY with HIV‐negative and 2.65/1000PY with unknown serostatus partners. HIV‐positive individuals had 2.39 (95% CI: 1.43 to 3.99) times higher hazard of forming a sexual partnership with an HIV‐positive partner than d
23. Does Incident Circumcision Lead to Risk Compensation? Evidence from a Population Cohort in KwaZulu-Natal, South Africa
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Ortblad, K.F., Harling, G., Chimbindi, N., Tanser, F, Salomon, J.A., Bärnighausen, T., Ortblad, K.F., Harling, G., Chimbindi, N., Tanser, F, Salomon, J.A., and Bärnighausen, T.
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Background: Voluntary medical male circumcision reduces men's risk of HIV acquisition and may thus increase HIV risk-related sexual behaviors through risk compensation. We analyze longitudinal data from one of Africa's largest population cohorts using fixed-effects panel estimation to measure the effect of incident circumcision on sexual behaviors. Setting: KwaZulu-Natal, South Africa. Methods: An open population cohort of men was followed from 2009 to 2015. Men self-reported their circumcision status and sexual behavior annually. We used linear regression models with individual-level fixed effects to measure the effect of incident circumcision on recent sex (past 12 months) and sexual behaviors that increase HIV risk (not using a condom at last sex, never using condoms with the most recent sexual partner, concurrent sexual partners at present, and multiple sexual partners in the past 12 months). We controlled for potential time-varying confounders: calendar year, age, education, and sexual debut. Results: The 5127 men in the cohort had a median age of 18 years (interquartile range 16–24) at cohort entry. Over the study period, almost 1 in 5 of these men (19.4%) became newly circumcised. Incident circumcision affected neither recent sex [percentage point (PP) change 0.0, 95% confidence interval: −1.2 to 1.3] nor sexual behaviors that increase HIV risk (PP −1.6, 95% confidence interval: −4.5 to 1.4). Conclusions: The data from this study strongly reject the hypothesis that circumcision affects sexual risk-taking. Risk compensation should not serve as an argument against increased and accelerated scale-up of circumcision in this and similar communities in South Africa.
24. Sources of social support and sexual behaviour advice for young adults in rural South Africa
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Harling, G., Gumede, D., Shahmanesh, M., Pillay, D., Bärnighausen, T.W., Tanser, F, Harling, G., Gumede, D., Shahmanesh, M., Pillay, D., Bärnighausen, T.W., and Tanser, F
- Abstract
Introduction While young people in sub-Saharan Africa (SSA) are at greatest risk of HIV acquisition, uptake of HIV prevention interventions among them has been limited. Interventions delivered through social connections have changed behaviour in many settings, but not to date in SSA. There is little systematic evidence on whom young SSA adults turn to for advice. We therefore conducted an exploratory cross-sectional study from whom young rural South Africans received support and sexual behaviour-specific advice. Methods We asked 119 18–34 year olds in rural KwaZulu-Natal about the important people in their lives who provided emotional, informational, financial, physical, social or other support. We also asked whether they had discussed sex or HIV prevention with each contact named. We used descriptive statistics and logistic regression to analyse support and advice provision patterns. Results Respondents named 394 important contacts, each providing a mean of 1.7 types of support. Most contacts were relatives, same-gender friends or romantic partners. Relatives provided most informational, financial and physical support; friends and partners more social support and sexual advice. Respondents reported discussing sexual matters with 60% of contacts. Sources of support changed with age, from friends and parents, towards siblings and partners. Discussion Sexual health interventions for young adults in rural South Africa may be able to harness friend and same-generation kin social ties through which sex is already discussed, and parental ties through which other forms of support are transmitted. The gender-segregated nature of social connections may require separate interventions for men and women.
25. Do age-disparate relationships drive HIV incidence in young women? Evidence from a population cohort in Rural KwaZulu-Natal, South Africa
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Harling, G., Newell, M.-L., Tanser, F., Kawachi, I., Subramanian, S.V., Bärnighausen, T., Harling, G., Newell, M.-L., Tanser, F., Kawachi, I., Subramanian, S.V., and Bärnighausen, T.
- Abstract
Background: Based on ethnographic investigations and mathematical models, older sexual partners are often considered a major risk factor for HIV for young women in sub-Saharan Africa. Numerous public health campaigns have been conducted to discourage young women from relationships with older men. However, longitudinal evidence relating sex partner age disparity to HIV acquisition in women is limited. Methods: Using data from a population-based open cohort in rural KwaZulu-Natal, South Africa, we studied 15- to 29-year-old women who were HIV seronegative at first interview between January 2003 and June 2012 (n = 2444). We conducted proportional hazards analysis to establish whether the age disparity of women's most recent sexual partner, updated at each surveillance round, was associated with subsequent HIV acquisition. Results: A total of 458 HIV seroconversions occurred over 5913 person-years of follow-up (incidence rate: 7.75 per 100 person-years). Age disparate relationships were common in this cohort; 37.7% of women reported a partner 5 or more years older than themselves. The age disparity of women's partners was not associated with HIV acquisition when measured either continuously [hazard ratio (HR) for 1-year increase in partner's age: 1.00, 95% confidence interval (CI): 0.97 to 1.03] or categorically (man ≥5 years older: HR, 0.98; 95% CI: 0.81 to 1.20; man ≥10 years older: HR, 0.98; 95% CI: 0.67 to 1.43). These results were robust to adjustment for known sociodemographic and behavioral HIV risk factors and did not vary significantly by women's age, marital status, education attainment, or household wealth. Conclusions: HIV incidence in young women was very high in this rural community in KwaZulu-Natal. Partner age disparity did not predict HIV acquistion. Campaigns to reduce age-disparate sexual relationships may not be a cost-effective use of HIV prevention resources in this setting.
26. Innovations in health and demographic surveillance systems to establish the causal impacts of HIV policies
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Herbst, K., Law, M., Geldsetzer, P., Tanser, F., Harling, G., Bärnighausen, T., Herbst, K., Law, M., Geldsetzer, P., Tanser, F., Harling, G., and Bärnighausen, T.
- Abstract
Purpose of review Health and demographic surveillance systems (HDSS), in conjunction with HIV treatment cohorts, have made important contributions to our understanding of the impact of HIV treatment and treatment-related interventions in sub-Saharan Africa. The purpose of this review is to describe and discuss innovations in data collection and data linkage that will create new opportunities to establish the impacts of HIV treatment, as well as policies affecting the treatment cascade, on population health and economic and social outcomes. Recent findings Novel approaches to routine collection of biomarkers, behavioural data, spatial data, social network information, migration events and mobile phone records can significantly strengthen the potential of HDSS to generate exposure and outcome data for causal analysis of HIV treatment impact and policies affecting the HIV treatment cascade. Additionally, by linking HDSS data to health service administration, education and welfare service records, researchers can substantially broaden opportunities to establish how HIV treatment affects health and economic outcomes when delivered through public sector health systems and at scale. Summary As the HIV treatment scaleup in sub-Saharan Africa enters its second decade, it is becoming increasingly important to understand the long-term causal impacts of large-scale HIV treatment and related policies on broader population health outcomes, such as noncommunicable diseases, as well as on economic and social outcomes, such as family welfare and children’s educational attainment. By collecting novel data and linking existing data to public sector records, HDSS can create near-unique opportunities to contribute to this research agenda.
27. List randomization for eliciting HIV status and sexual behaviors in rural KwaZulu-Natal, South Africa: A randomized experiment using known true values for validation
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Haber, N., Harling, G., Cohen, J., Mutevedzi, T., Tanser, F., Gareta, D., Herbst, K., Pillay, D., Bärnighausen, T., Fink, G., Haber, N., Harling, G., Cohen, J., Mutevedzi, T., Tanser, F., Gareta, D., Herbst, K., Pillay, D., Bärnighausen, T., and Fink, G.
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Background List randomization (LR), a survey method intended to mitigate biases related to sensitive true/false questions, has received recent attention from researchers. However, tests of its validity are limited, with no study comparing LR-elicited results with individually known truths. We conducted a test of LR for HIV-related responses in a high HIV prevalence setting in KwaZulu-Natal. By using researcher-known HIV serostatus and HIV test refusal data, we were able to assess how LR and direct questionnaires perform against individual known truth. Methods Participants were recruited from the participation list from the 2016 round of the Africa Health Research Institute demographic surveillance system, oversampling individuals who were HIV positive. Participants were randomized to two study arms. In Arm A, participants were presented five true/false statements, one of which was the sensitive item, the others non-sensitive. Participants were then asked how many of the five statements they believed were true. In Arm B, participants were asked about each statement individually. LR estimates used data from both arms, while direct estimates were generated from Arm B alone. We compared elicited responses to HIV testing and serostatus data collected through the demographic surveillance system. Results We enrolled 483 participants, 262 (54%) were randomly assigned to Arm A, and 221 (46%) to Arm B. LR estimated 56% (95% CI: 40 to 72%) of the population to be HIV-negative, compared to 47% (95% CI: 39 to 54%) using direct estimates; the population-estimate of the true value was 32% (95% CI: 28 to 36%). LR estimates yielded HIV test refusal percentages of 55% (95% CI: 37 to 73%) compared to 13% (95% CI: 8 to 17%) by direct estimation, and 15% (95% CI: 12 to 18%) based on observed past behavior. Conclusions In this context, LR performed poorly when compared to known truth, and did not improve estimates over direct questioning methods when comparing with known truth. These res
28. Antiretroviral therapy to prevent HIV acquisition in serodiscordant couples in a hyperendemic community in rural South Africa
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Oldenburg, C.E., Bärnighausen, T., Tanser, F., Iwuji, C.C., De Gruttola, V., Seage, G.R., Mimiaga, M.J., Mayer, K.H., Pillay, D., Harling, G., Oldenburg, C.E., Bärnighausen, T., Tanser, F., Iwuji, C.C., De Gruttola, V., Seage, G.R., Mimiaga, M.J., Mayer, K.H., Pillay, D., and Harling, G.
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Background. Antiretroviral therapy (ART) was highly efficacious in preventing human immunodeficiency virus (HIV) transmission in stable serodiscordant couples in the HPTN-052 study, a resource-intensive randomized controlled trial with near-perfect ART adherence and mutual HIV status disclosure among all participating couples. However, minimal evidence exists of the effectiveness of ART in preventing HIV acquisition in stable serodiscordant couples in “real-life” population-based settings in hyperendemic communities of sub-Saharan Africa, where health systems are typically resource-poor and overburdened, adherence to ART is often low, and partners commonly do not disclose their HIV status to each other. Methods. Data arose from a population-based open cohort in KwaZulu-Natal, South Africa. A total of 17 016 HIV-uninfected individuals present between January 2005 and December 2013 were included. Interval-censored time-updated proportional hazards regression was used to assess how the ART status affected HIV transmission risk in stable serodiscordant relationships. Results. We observed 1619 HIV seroconversions in 17 016 individuals, over 60 349 person-years follow-up time. During the follow-up period, 1846 individuals had an HIV-uninfected and 196 had an HIV-infected stable partner HIV incidence was 3.8/100 person-years (PY) among individuals with an HIV-infected partner (95% confidence interval [CI], 2.3–5.6), 1.4/100 PY (.4–3.5) among those with HIV-infected partners receiving ART, and 5.6/100 PY (3.5–8.4) among those with HIV-infected partners not receiving ART. Use of ART was associated with a 77% decrease in HIV acquisition risk among serodiscordant couples (adjusted hazard ratio, 0.23; 95% CI, .07–.80). Conclusions. ART initiation was associated with a very large reduction in HIV acquisition in serodiscordant couples in rural KwaZulu-Natal. However, this “real-life” effect was substantially lower than the effect observed in the HPTN-052 trial. To eliminate H
29. Reply to Cohen et al
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Oldenburg, C.E., Bärnighausen, T., Tanser, F., Iwuji, C.C., De Gruttola, V., Seage, G.R., Mimiaga, M.J., Mayer, K.H., Pillay, D., Harling, G., Oldenburg, C.E., Bärnighausen, T., Tanser, F., Iwuji, C.C., De Gruttola, V., Seage, G.R., Mimiaga, M.J., Mayer, K.H., Pillay, D., and Harling, G.
30. A DRAM compiler for fully optimized memory instances
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Harling, G., primary
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31. P3.97 A scoping review of prevalence, incidence and risk factors for hiv infection amongst young people in brazil
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Saffier, IP, Kawa, H, and Harling, G
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IntroductionDespite young people being a key population for HIV prevention, the HIV epidemic amongst young Brazilians is perceived to be growing. We therefore reviewed all published literature on HIV prevalence and risk factors for HIV infection amongst 10–25 year olds in Brazil. MethodsWe searched Embase, LILACS, PsycINFO, PubMed and Web of Science for studies published up to May 2015 and analysed reference lists of relevant studies. We included peer-reviewed studies from any time in the HIV epidemic which provided estimates specific to ages 10–25 (or some subset of this age range) for Brazilians on either: (a) HIV prevalence or incidence; or (b) the association between HIV and socio-demographic or behavioural risk factors. Results37 studies in 36 publications met the inclusion criteria: 33 cross-sectional, two case-control, two cohort. Three studies analysed national data. 31 studies provided HIV prevalence estimates, largely for six population subgroups: Counselling and Testing Centre attendees; blood donors; pregnant women; institutional individuals; men-who-have-sex-with-men (MSM) and female sex workers (FSW); two provided HIV incidence estimates. Ten studies showed HIV status to be associated with a wide range of risk factors, including age, sexual and reproductive history, infection history, substance use, geography, marital status, mental health and socioeconomic status.ConclusionFew published studies have examined HIV amongst young people in Brazil, and those published have been largely cross-sectional and focused on traditional risk groups and the south of the country. Despite these limitations, the literature shows raised HIV prevalence amongst MSM and FSW, as well as amongst those using drugs. Time trends are harder to identify, although rates appear to be falling for pregnant women, possibly reversing an earlier de-masculinization of the epidemic. Improved surveillance of HIV incidence, prevalence and risk factors is a key component of efforts to eliminate HIV in Brazil.
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- 2017
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32. Healthcare utilization of patients accessing an African national treatment program
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Wood Robin, Orrell Catherine, and Harling Guy
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Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background The roll-out of antiretroviral therapy (ART) in Africa will have significant resource implications arising from its impact on demand for healthcare services. Existing studies of healthcare utilization on HAART have been conducted in the developed world, where HAART is commenced when HIV illness is less advanced. Methods This paper describes healthcare utilization from program entry by treatment-naïve patients in a peri-urban settlement in South Africa. Treatment criteria included a CD4 cell count Results 212 patients were followed for a median of 490 days. Outpatient visits per 100 patient years of observation (PYO), excluding scheduled primary-care follow-up, fell from 596 immediately prior to ART to 334 in the first 48 weeks on therapy and 245 thereafter. Total inpatient time fell from 2,549 days per 100 PYO pre-ART to 476 in the first 48 weeks on therapy and 73 thereafter. This fall in healthcare utilization occurred at every level of care. The greatest causes of utilization were tuberculosis, cryptococcal meningitis, HIV-related neoplasms and adverse reactions to stavudine. After 48 weeks on ART demand reverted to primarily non-HIV-related causes. Conclusion Utilization of both inpatient and outpatient hospital services fell significantly after commencement of ART for South African patients in the public sector, with inpatient demand falling fastest. Earlier initiation might reduce early on-ART utilization rates.
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- 2007
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33. RESULTS OF IRRADIATION EXPERIMENTS ON COMBINATION BOILING/SUPERHEAT FUEL ELEMENTS IN THE KAHL NUCLEAR POWER STATION
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Harling, G
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- 1965
34. 9. Schizaeaceae
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Øllgaard, B., Harling, G., and Andersson, L.
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- 2001
35. 6. Ophioglossaceae
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Øllgaard, B., Harling, G., and Andersson, L.
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- 2001
36. 10. Gleicheniaceae
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Andersen, E.Ø., Øllgaard, B., Harling, G., and Andersson, L.
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- 2001
37. 8B. Plagiogyriaceae
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Øllgaard, B., Harling, G., and Andersson, L.
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- 2001
38. Limnocharitaceae
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Holm-Nielsen, Rektor Lauritz B., Haynes, R.R., Harling, G., and Sparre, B.
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- 1986
39. Potamogetonaceae
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Holm-Nielsen, Rektor Lauritz B., Haynes, R.R., Harling, G., and Sparre, B.
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- 1986
40. Hydrocharitaceae
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Holm-Nielsen, Rektor Lauritz B., Haynes, R.R., Harling, G., and Sparre, B.
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- 1986
41. Najadaceae
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Holm-Nielsen, Rektor Lauritz B., Haynes, R.R., Harling, G., and Sparre, B.
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- 1986
42. Zanichelliaceae
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Holm-Nielsen, Rektor Lauritz B., Haynes, R.R., Harling, G., and Sparre, B.
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- 1986
43. Alismataceae
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Holm-Nielsen, Rektor Lauritz B., Haynes, R.R., Harling, G., and Sparre, B.
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- 1986
44. Association of relationship satisfaction with blood pressure: a cross-sectional study of older adults in rural Burkina Faso.
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Jaspert FM, Harling G, Sie A, Bountogo M, Bärnighausen T, Ditzen B, and Fischer MS
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- Humans, Burkina Faso, Female, Male, Cross-Sectional Studies, Middle Aged, Aged, Adult, Surveys and Questionnaires, Interpersonal Relations, Blood Pressure physiology, Rural Population statistics & numerical data, Personal Satisfaction
- Abstract
Objectives: The objective of this study is to examine the association between relationship satisfaction and blood pressure (BP) in a low-income setting and to screen for gender moderation in this context. Research conducted in high-income settings suggests that relationship satisfaction is associated with better physical and mental health outcomes., Design: A cross-sectional study design was employed, using both questionnaire and physical measurement data. Multiple linear regression models were calculated for systolic and diastolic BP and adjusted for age, gender, demographics/socioeconomics and other health-related variables. Gender moderation was tested using interaction terms in multivariable analyses., Setting: A household survey was conducted in 2018 in rural northwestern Burkina Faso., Participants: Final analysis included 2114 participants aged over 40 who were not pregnant, reported being in a partnership and had valid BP readings., Main Outcome Measures: Systolic and diastolic BP levels., Results: A significant positive association existed between relationship satisfaction (Couples Satisfaction Index-4 score) and systolic BP (B=0.23, 95% CI (0.02 to 0.45), p=0.03) when controlling for demographics/socioeconomics. Nevertheless, this relationship lost statistical significance when additional adjustments were made for health-related variables (B=0.21, 95% CI (-0.01 to 0.42), p=0.06). There was no significant association of relationship satisfaction and diastolic BP and no evidence of gender moderation., Conclusion: In contrast to many higher-income settings, we found a positive association between relationship satisfaction and systolic BP in very low-income rural Burkina Faso. Our results add to the evidence regarding the contextual nature of the association between relationship satisfaction and health, as high relationship satisfaction may not act as a health promotor in this socioeconomic context., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2024. Re-use permitted under CC BY. Published by BMJ.)
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- 2024
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45. Intensity of care and the health status of caregivers to elderly rural South Africans.
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Matina SS, Manderson L, Xavier Gómez-Olivé F, Berkman GO, and Harling G
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Objectives: Informal caregivers play an indispensable role in and are often the sole source of care for older adults in low and middle-income settings worldwide. Intensive informal care predicts mortality and morbidity among caregivers in higher-income settings. However, there is limited evidence from poorer settings, including Africa countries, where caregiving is shared widely, including across generations. We therefore investigated caregivers' health status in rural South Africa., Methods: We conducted quantitative interviews with all household members and all non-household caregivers aged ≥12 (n=1012) of 106 older adults in rural Mpumalanga, South Africa. We used multivariable regression with care-recipient random intercepts to assess the relationships between four caregiving characteristics and both self-reported chronic conditions and self-reported health status, considering how caregiver age moderated each association., Results: Over half of all caregivers reported at least one chronic health condition, despite half being aged under 40. Caregivers self-reporting the worst health status provided high hours of care. However, caregivers' health status was not significantly associated with weekly care quantity or history of caring. Those aged ≥40 who reported being a main caregiver had 52% increased odds of reporting poorer health compared to other same-aged carers (95% confidence interval: 0.99, 2.35), while having more chronic conditions was associated with being expected to act as a sole caregiver more often among caregivers aged ≤39., Discussion: Greater caring responsibilities for older adults were not consistently associated with caregivers' health in a setting where poor health is common, and caregiving is spread widely. Longitudinal data is necessary to unpack possible explanations of these findings, and to determine whether intensive caregiving speeds downward health trajectories for carers.
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- 2024
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46. eYoung men's experiences of violence and poverty and the relationship to sexually transmissible HIV: a cross sectional study from rural South Africa.
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Gibbs A, Chirwa E, Harling G, Chimbindi N, Dreyer J, Herbst C, Okesola N, Behuhuma O, Mthiyane N, Baisley K, Zuma T, Smit T, McGrath N, Sherr L, Seeley J, and Shahmanesh M
- Abstract
Background: Young (ages 18-35 years) men are inadequately engaged in HIV prevention and treatment globally, including in South Africa, increasing the likelihood of them having sexually transmissible HIV (i.e. living with HIV but with high viral loads). We sought to understand how men's experiences of poverty and violence, impacted on transmissible HIV, directly or indirectly via mental health and substance misuse., Setting: Rural communities in northern KwaZulu-Natal, South Africa., Methods: Cross-sectional population-based random selection (September 2018-June 2019), assessing transmissible HIV (living with HIV and viral load ≥400 copies/mL) via dried blood spots, and socio-demographic data. Structural equation models (SEM), assessed direct and indirect pathways from food insecurity and violence experience to transmissible-HIV, with mediators common mental disorders, alcohol use, gender inequitable attitudes and perceptions of life chances., Results: 2,086 young (ages 18-36 years) men and 8.6%(n=178) men had transmissible HIV. In SEM no direct pathways between food insecurity, or violence experience, and transmissible HIV. Poor mental health and alcohol use mediated the relationship between violence experience and food insecurity and transmissible HIV. Life chances also mediated the food insecurity to transmissible HIV pathway., Conclusions: There was a high level of transmissible HIV in a representative sample of young men. The analysis highlights the need to address both the proximate 'drivers' poor mental health and substance misuse, as well as the social contexts shaping these among young men, namely poverty and violence experience. Building holistic interventions that adequately engage these multiple challenges is critical for improving HIV among young men., Competing Interests: Conflict of Interest Statement The authors have no conflict of interests to report.
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- 2024
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47. Social support receipt as a predictor of mortality: A cohort study in rural South Africa.
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Kapaon D, Riumallo-Herl C, Jennings E, Abrahams-Gessel S, Makofane K, Kabudula CW, and Harling G
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The mechanisms connecting various types of social support to mortality have been well-studied in high-income countries. However, less is known about how these relationships function in different socioeconomic contexts. We examined how four domains of social support-emotional, physical, financial, and informational-impact mortality within a sample of older adults living in a rural and resource-constrained setting. Using baseline survey and longitudinal mortality data from HAALSI, we assessed how social support affects mortality in a cohort of 5059 individuals aged 40 years or older in rural Mpumalanga, South Africa. Social support was captured as the self-reported frequency with which close social contacts offered emotional, physical, financial, and informational support to respondents, standardized across the sample to increase interpretability. We used Cox proportional hazard models to evaluate how each support type affected mortality controlling for potential confounders, and assessed potential effect-modification by age and sex. Each of the four support domains had small positive associations with mortality, ranging from a hazard ratio per standard deviation of support of 1.04 [95% CI: 0.95,1.13] for financial support to 1.09 [95% CI: 0.99,1.18] for informational support. Associations were often stronger for females and younger individuals. We find baseline social support to be positively associated with mortality in rural South Africa. Possible explanations include that insufficient social support is not a strong driver of mortality risk in this setting, or that social support does not reach some necessary threshold to buffer against mortality. Additionally, it is possible that the social support measure did not capture more relevant aspects of support, or that our social support measures captured prior morbidity that attracted support before the study began. We highlight approaches to evaluate some of these hypotheses in future research., Competing Interests: The authors have declared that no competing interests exist., (Copyright: © 2024 Kapaon et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)
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- 2024
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48. Publisher Correction: Local network interaction as a mechanism for wealth inequality.
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Yu ST, Wang P, Kabudula CW, Gareta D, Harling G, and Houle B
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- 2024
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49. Effectiveness of integrating HIV prevention within sexual reproductive health services with or without peer support among adolescents and young adults in rural KwaZulu-Natal, South Africa (Isisekelo Sempilo): 2 × 2 factorial, open-label, randomised controlled trial.
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Shahmanesh M, Chimbindi N, Busang J, Chidumwa G, Mthiyani N, Herbst C, Okesola N, Dreyer J, Zuma T, Luthuli M, Gumede D, Hlongwane S, Mdluli S, Msane S, Smit T, Molina JM, Khoza T, Behuhuma NO, McGrath N, Seeley J, Harling G, Sherr L, Copas A, and Baisley K
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- Humans, Adolescent, South Africa epidemiology, Female, Young Adult, Male, Adult, HIV Testing methods, Pre-Exposure Prophylaxis, Viral Load, HIV Infections prevention & control, Rural Population, Peer Group, Reproductive Health Services
- Abstract
Background: Approximately 200 000 South Africans acquired HIV in 2021 despite the availability of universal HIV test and treat and pre-exposure prophylaxis (PrEP). The aim of this study was to test the effectiveness of sexual and reproductive health services or peer support, or both, on the uptake of serostatus neutral HIV services or reduction of sexually transmissible HIV., Methods: We did an open-label, 2 × 2 randomised factorial trial among young people in a mostly rural area of KwaZulu-Natal, South Africa. Inclusion criteria included being aged 16-29 years, living in the mapped geographical areas that were accessible to the area-based peer navigators, being willing and able to provide informed consent, and being willing to provide a dried blood spot for anonymous HIV testing and HIV viral load measurement at 12 months. Participants were randomly allocated by computer-generated algorithm to one of four groups: those in the standard-of-care group were referred to youth-friendly services for differentiated HIV prevention (condoms, universal HIV test and treat with antiretroviral therapy, and PrEP if eligible); those in the sexual and reproductive health services group received baseline self-collected specimens for sexually transmitted infection (STI) testing and referral to integrated sexual and reproductive health and HIV prevention services; those in the peer support group were referred to peer navigators for health promotion, condom provision, and facilitation of attendance for differentiated HIV prevention services; and those in the final group received a combination of sexual and reproductive health services and peer support. Coprimary outcomes were linkage to clinical services within 60 days of enrolment, proportion of participants who had sexually transmissible HIV at 12 months after enrolment, and proportion of sampled individuals who consented to participation and gave a dried blood spot for HIV testing at 12 months. Logistic regression was used for analyses, and adjusted for age, sex, and rural or peri-urban area of residence. This study is registered with ClinicalTrials.gov (NCT04532307) and is closed., Findings: Between March 2, 2020, and July 7, 2022, 1743 (75·7%) of 2301 eligible individuals were enrolled and followed up. 12-month dried blood spots were collected from 1168 participants (67·0%). The median age of the participants was 21 years (IQR 18-25), 51·4% were female, and 51·1% had secondary level education. Baseline characteristics and 12-month outcome ascertainment were similar between groups. 755 (43·3%) linked to services by 60 days. 430 (49·8%) of 863 who were in the sexual reproductive health services group were linked to care compared with 325 (36·9%) of 880 who were not in the sexual and reproductive health services group (adjusted odds ratio [aOR] 1·68; 95% CI 1·39-2·04); peer support had no effect: 385 (43·5%) of 858 compared with 370 (43·1%) of 885 (1·02, 0·84-1·23). At 12 months, 227 (19%) tested ELISA-positive for HIV, of whom 41 (18%) had viral loads of 400 copies per mL; overall prevalence of transmissible HIV was 3·5%. 22 (3·7%) of 578 participants in the sexual and reproductive health services group had transmissible HIV compared with 19 (3·3%) of 590 not in the sexual and reproductive health services group (aOR 1·12; 95% CI 0·60-2·11). The findings were also non-significant for peer support: 21 (3·3%) of 565 compared with 20 (3·3%) of 603 (aOR 1·03; 95% CI 0·55-1·94). There were no serious adverse events or deaths during the study., Interpretation: This study provides evidence that STI testing and sexual and reproductive health services create demand for serostatus neutral HIV prevention in adolescents and young adults in Africa. STI testing and integration of HIV and sexual health has the potential to reach those at risk and tackle unmet sexual health needs., Funding: US National Institute of Health, Bill & Melinda Gates Foundation, and 3ie., Competing Interests: Declaration of interests We declare no competing interests., (Copyright © 2024 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY 4.0 license. Published by Elsevier Ltd.. All rights reserved.)
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- 2024
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50. Frailty progression in adults aged 40 years and older in rural Burkina Faso: a longitudinal, population-based study.
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Goodman-Palmer D, Greig C, Agyapong-Badu S, Witham MD, Payne CF, Bountogo M, Coulibaly B, Geldsetzer P, Harling G, Inghels M, Manne-Goehler J, Ouermi L, Sie A, and Davies JI
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- Humans, Male, Female, Longitudinal Studies, Aged, Middle Aged, Burkina Faso epidemiology, Adult, Disease Progression, Aged, 80 and over, Frail Elderly statistics & numerical data, Frailty epidemiology, Frailty mortality, Rural Population statistics & numerical data
- Abstract
Background: Little is known about ageing and frailty progression in low-income settings. We aimed to describe frailty changes over time in individuals living in rural Burkina Faso and to assess which sociodemographic, disability, and multimorbidity factors are associated with frailty progression and mortality., Methods: This longitudinal, population-based study was conducted at the Nouna Health and Demographic Surveillance Systems (HDSS) site in northwestern Burkina Faso. Eligible participants were aged 40 years or older and had been primarily resident in a household within the HDSS area for at least the past 6 months before the baseline survey and were selected from the 2015 HDSS household census using a stratified random sample of adults living in unique households within the area. Participants were interviewed in their homes in 2018 (baseline), 2021 (follow-up), or both. We derived the Fried frailty score for each participant at each timepoint using data on grip strength, gait speed, self-reported weight loss, self-reported exhaustion, and physical activity, and described changes in frailty status (no frailty, pre-frailty, or frailty) between 2018 and 2021. We used multivariate regression models to assess factors (ie, sex, age, marital status, educational attainment, wealth quintile, WHO Disability Assessment Schedule (WHODAS) score, and multimorbidity) associated with frailty progression (either worsening frailty status or dying, compared with frailty status remaining the same or improving) and with mortality, and developed sequential models: unadjusted, adjusting for sociodemographic factors (sex, age, marital status, educational attainment, and wealth quintile), and adjusting for sociodemographic factors, disability, and multimorbidity., Findings: Between May 25 and July 19, 2018, and between July 1 and Aug 22, 2021, 5952 individuals were invited to participate: 1709 (28·7%) did not consent, 1054 (17·8%) participated in 2018 only and were lost to follow-up, 1214 (20·4%) participated in 2021 only, and 1975 (33·2%) were included in both years or died between years. Of 1967 participants followed up with complete demographic data, 190 (9·7%) were frail or unable to complete the frailty assessment in 2018, compared with 77 (3·9%) in 2021. Between 2018 and 2021, frailty status improved in 567 (28·8%) participants and worsened in 327 (16·6%), and 101 (5·1%) participants died. The relative risk of frailty status worsening or of dying (compared with frailty impRoving or no change) increased with age and WHODAS score, whereas female sex appeared protective. After controlling for all sociodemographic factors, multimorbidity, and WHODAS score, odds of mortality were 1·07 (odds ratio 2·07, 95% CI 1·05-4·09) times higher among pre-frail individuals and 1·1 (2·21, 0·90-5·41) times higher among frail individuals than among non-frail individuals., Interpretation: Frailty status was highly dynamic in this low-income setting and appears to be modifiable. Given the rapid increase in the numbers of older adults in low-income or middle-income countries, understanding the behaviour of frailty in these settings is of high importance for the development of policies and health systems to ensure the maintenance of health and wellbeing in ageing populations. Future work should focus on designing context-appropriate interventions to improve frailty status., Funding: Alexander Von Humboldt Foundation, Institute for Global Innovation, University of Birmingham, and Wellcome Trust., Competing Interests: Declaration of interests DG-P provides scientific consultations through Epidemiologic Research & Methods, none of which are related to the topic of the current study. All other authors declare no competing interests., (Copyright © 2024 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY-NC-ND 4.0 license. Published by Elsevier Ltd.. All rights reserved.)
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- 2024
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