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  • Title: Incident HIV-1 infection in a cohort of young women in Butare, Rwanda.
    Author: Bulterys M, Chao A, Habimana P, Dushimimana A, Nawrocki P, Saah A.
    Journal: AIDS; 1994 Nov; 8(11):1585-91. PubMed ID: 7848595.
    Abstract:
    OBJECTIVE: To determine the incidence of HIV-1 infection and associated risk factors among young, seronegative, and sexually active women in a mixed rural and urban population in southern Rwanda. DESIGN: A prospective cohort study. METHODS: Between October 1991 and April 1993, we completed a 2-year follow-up survey among HIV-1-seronegative women aged < or = 30 years at the time of their initial HIV-1 screening during pregnancy. All women aged < or = 25 years and a randomly selected sample of 26-30-year olds were invited to participate from five prenatal clinics in the Butare region. The interview focused on potential risk factors for HIV-1 acquisition during the 2-year interval between blood collection. RESULTS: Out of 1524 women selected, 1150 (75%) participated in the follow-up survey. The 2-year incidence of HIV-1 infection was 2.7% [95% confidence interval (CI), 1.8-3.9]. Teenage women were at the highest risk (incidence, 10.5%; 95% CI, 5.2-19.4), with incidence leveling off with increasing age (P < 0.001). Women who began sexual activity recently were also at higher risk; the lowest risk category consisted of women aged 26-30 years with 5 or more years of sexual experience. The more urban the geographic residence of the woman, the more likely she was to have acquired HIV-1 infection (P < 0.001). In the urban and peri-urban zones, the poorest women were at significantly higher risk of incident HIV-1 infection than women reporting higher household income. In a multivariate analysis, young maternal age, marital status (being single, divorced or widowed), multiple sexual partners, and a history of sexually transmitted diseases remained strongly associated with incident HIV-1 infection. Geographic residence, hormonal contraception, and receipt of injections were no longer significantly associated with incident HIV-1 infection when these other factors were accounted for simultaneously. CONCLUSION: Among young Rwandan women, the early years of sexual activity are particularly dangerous for acquisition of HIV-1 infection. Interventions should focus on young teenagers before they become sexually active.
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