High uptake of exclusive breastfeeding and reduced risks of postnatal HIV transmission Zambia Exclusive Breastfeeding Study Louise Kuhn, Moses Sinkala,

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Presentation transcript:

High uptake of exclusive breastfeeding and reduced risks of postnatal HIV transmission Zambia Exclusive Breastfeeding Study Louise Kuhn, Moses Sinkala, Chipepo Kankasa, Prisca Kasonde, Cheswa Vwalika, Mwiya Mwiya, Nancy Scott, Katherine Semrau, Grace Aldrovandi, Donald M. Thea Columbia University, New York Lusaka District Health Management Team, Zambia University Teaching Hospital, Lusaka, Zambia Boston University Children’s Hospital of Los Angeles

Nested within the clinical trial Zambia Exclusive Breastfeeding Study Observational objective: To investigate the feasibility and effectiveness of exclusive breastfeeding to reduce early postnatal HIV transmission

Study design Prospective, epidemiological study nested within randomized trial of early weaning 958 HIV-infected women and their infants followed to 24 months in Lusaka, Zambia Comprehensive intervention to support EBF to 4 months for all Analyze HIV transmission by actual feeding practices

EBF intervention One-to-one counseling Antenatal (at least 2 sessions) Postnatal Clinic-based (monthly) Home visits (interspersed) Support for breastfeeding initiation at delivery Community outreach and education Mothers’ support groups

High uptake of exclusive breastfeeding among 958 HIV-infected women in Lusaka, Zambia Cum. 84% still EBF by 4 m Non-EBF = give any non-breast milk liquid or solid (except medicines) in past 24 hours or at least once per week

Benefits of exclusive breastfeeding on early postnatal transmission through 4 months Exclusive BF Non-exclusive BF 4.0% 10.1% P=0.002 Increased transmission due to non-exclusive BF: (as time-dependent) Relative Hazard 3.5 (95% CI: 1.7–7.2)

Characteristics of EBF & non-EBF women Exclusive Primiparous 11% Access to water 16% Employed 6% Birth weight 3010 Median CD4 count 354 Median viral load 29,482 Non-exclusive 21% * 25% * 12% * 3068 grams ns 327 cells/uL ns 43,989 cpm ns RH = 2.7 (95% CI 1.3-5.6) after adjust for CD4 count, viral load, RPR, birth weight

Age-specific hazard rates of postnatal HIV transmission per month of breastfeeding in control group Non-EBF BF w CF (Non-EBF) EBF

Conclusions High uptake of EBF can be achieved among HIV-infected women in low resource settings EBF is associated with a >50% reduction in early postnatal HIV transmission Implementation of programs to support EBF is an urgent priority

Funding: National Institute of Child Health and Human Development (NICHD, NIH) HD 39611 / HD 40777