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Medical News

HIV Prevalence and Sexual Behaviour Changes Measured in an Antenatal Clinic Setting in Northern Tanzania

August 25, 2006

The authors conducted the current study to assess the feasibility of collecting sexual behavior data during HIV surveillance in antenatal care clinics (ANC) and to determine whether such data can provide information about the correlates of HIV infection in this population.

Researchers conducted sexual behavior surveys in the context of two HIV sentinel surveillance rounds in 11 ANC clinics in northwest Tanzania between 2000 and 2002. Individual women's responses were linked anonymously to their HIV status. Three clinic catchment areas overlapped with a community-based longitudinal study, which provided independent estimates of HIV prevalence and sexual behavior. The investigators assessed changes between rounds and differentials between clinics. They used a two-level logistic regression model to identify behavioral and contextual correlates of HIV in 3,689 women less than 25 years of age.

Clinic attendees were willing to participate in the study. The researchers found that sexual behavior data they obtained were internally consistent and tallied reasonably well with sexual behavior data collected in the community overlapping the clinic catchment. Clear relations emerged between HIV infection and measures of sexual exposure: OR 1.20 (95 percent CL 1.12 to 1.28) for each year of premarital exposure and 1.09 (1.04 to 1.16) for each year after first marriage; background prevalence OR 1.15 (1.04 to 1.26) associated with each percentage point increase in background prevalence at the clinic; and certain partnership variables such as partner's age OR 0.58 (0.45 to 0.76) if partner was less than 10 years older.

"Conducting sexual behavior surveys in the context of ANC clinics surveillance is feasible and yields useful data," the authors concluded.

Back to other news for August 25, 2006

Adapted from:
Sexually Transmitted Infections
08.08.2006; Vol. 82: P. 301-306; M. Urassa; Y. Kumogola; R. Isingo; G. Mwaluko; B. Makelemo; K. Mugeye; T. Boerma; T. Calleja; E. Slaymaker; B. Zaba

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This article was provided by CDC National Prevention Information Network. It is a part of the publication CDC HIV/Hepatitis/STD/TB Prevention News Update.
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