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Background: Many prevention of vertical transmission (PVT) studies assess outcomes within 12 months postpartum and exclude those lost to follow-up (LTFU), potentially biasing outcomes toward those retained in care., Setting: Five public facilities in western Kenya., Methods: We recruited women living with HIV (WLH) ≥18 years enrolled in antenatal clinic (ANC). WLH retained in care (RW) were recruited during pregnancy and followed with their children through 6 months postpartum; WLH LTFU (LW, last visit >90 days) after ANC enrollment and ≤6 months postpartum were recruited through community tracing. Recontact at 3 years was attempted for all participants. Primary outcomes were retention and child HIV-free survival. Generalized linear regression was used to estimated risk ratios (RRs) for associations with becoming LTFU by 6 months postpartum, adjusting for age, education, facility, travel time to facility, gravidity, income, and new vs. known HIV positive at ANC enrollment., Results: Three hundred thirty-three WLH (222 RW, 111 LW) were recruited from 2018 to 2019. More LW versus RW were newly diagnosed with HIV at ANC enrollment (49.6% vs. 23.9%) and not virally suppressed at study enrollment (40.9% vs. 7.7%). 6-month HIV-free survival was lower for children of LW (87.9%) versus RW (98.7%). At 3 years, 230 WLH were retained in care (including 51 previously LTFU before 6 months), 30 transferred, 70 LTFU, and 3 deceased. 3-year child HIV-free survival was 81.9% (92.0% for children of RW, 58.6% for LW), 3.7% were living with HIV, 3.7% deceased, and 10.8% had unknown HIV/vital status. Being newly diagnosed with HIV at ANC enrollment was the only factor associated with becoming LTFU (aRR 1.21, 95% CI: 1.11 to 1.31)., Conclusions: Outcomes among those LTFU were worse than those retained in care, underscoring the importance of retention in PVT services. Some, but not all, LW re-engaged in care by 3 years, suggesting the need for PVT services must better address the barriers and transitions women experience during pregnancy and postpartum., Competing Interests: The East Africa International Epidemiology Databases to Evaluate AIDS (IeDEA) is supported by the US National Institutes of Health's National Institute of Allergy and Infectious Diseases, the Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), the National Cancer Institute, the National Institute of Mental Health, the National Institute on Drug Abuse, the National Heart, Lung, and Blood Institute, the National Institute on Alcohol Abuse and Alcoholism, the National Institute of Diabetes and Digestive and Kidney Diseases, the Fogarty International Center, and the National Library of Medicine (#U01AI069911). This work was also supported by the Moi Teaching and Referral Hospital Intramural Research Fund. Dr. Humphrey's effort was supported by the NICHD (K23HD105495). The authors declare no conflicts of interest., (Copyright © 2024 The Author(s). Published by Wolters Kluwer Health, Inc.)

Background: Differentiated service delivery models are implemented by HIV care programs globally, but models for pregnant and postpartum women living with HIV (PPWH) are lacking. We conducted a discrete choice experiment to determine women's preferences for differentiated service delivery., Setting: Five public health facilities in western Kenya., Methods: PPWH were enrolled from April to December 2022 and asked to choose between pairs of hypothetical clinics that differed across 5 attributes: clinic visit frequency during pregnancy (monthly vs. every 2 months), postpartum visit frequency (monthly vs. only with routine infant immunizations), seeing a mentor mother (each visit vs. as needed), seeing a clinician (each visit vs. as needed), and basic consultation cost (0, 50, or 100 Kenya Shillings [KSh]). We used multinomial logit modeling to determine the relative effects (β) of each attribute on clinic choice., Results: Among 250 PPWH (median age 31 years, 42% pregnant, 58% postpartum, 20% with a gap in care), preferences were for pregnancy visits every 2 months (β = 0.15), postpartum visits with infant immunizations (β = 0.36), seeing a mentor mother and clinician each visit (β = 0.05 and 0.08, respectively), and 0 KSh cost (β = 0.39). Preferences were similar when stratified by age, pregnancy, and retention status. At the same cost, predicted market choice for a clinic model with fewer pregnant/postpartum visits was 75% versus 25% for the standard of care (ie, monthly visits during pregnancy/postpartum)., Conclusion: PPWH prefer fewer clinic visits than currently provided within the standard of care in Kenya, supporting the need for implementation of differentiated service delivery for this population., Competing Interests: The authors have no conflicts of interest to disclose., (Copyright © 2023 The Author(s). Published by Wolters Kluwer Health, Inc.)