OBJECTIVE: In Africa, HIV surveillance is conducted among antenatal clinic (ANC) attendees using unlinked-anonymous testing (UAT). In Kenya, the utility of prevention of mother-to-child transmission (PMTCT) program data for HIV surveillance was evaluated. METHODS: UAT and PMTCT data were compared at the same clinics and for the same time (2003 UAT survey) period. The HIV testing uptake for PMTCT was defined as the number of ANC attendees tested for HIV out of those who had their first ANC visit during the ANC surveillance period. Odds ratios and 95% confidence intervals were calculated to determine associations between demographic characteristics and HIV testing acceptance. RESULTS: Of 39 ANC-UAT sites, six had PMTCT data. PMTCT data were recorded across several logbooks with varying quality. For PMTCT, 2,239 women were offered HIV testing and 1,258 (56%) accepted; for UAT, 1,852 women were sampled. Median UAT-based HIV prevalence was 12.8% (range, 8.1%-26.3%) compared with 14.4% (range, 7.0%-27.2%) in PMTCT. HIV testing acceptance for PMTCT ranged from 48% to 69% across clinics, and was more likely among primigravidae than multigravidae. CONCLUSION: Because of varying PMTCT data quality and varying HIV testing acceptance for PMTCT, PMTCT-based HIV prevalence estimates cannot currently replace UAT-based estimates in Kenya.
OBJECTIVE: In Africa, HIV surveillance is conducted among antenatal clinic (ANC) attendees using unlinked-anonymous testing (UAT). In Kenya, the utility of prevention of mother-to-child transmission (PMTCT) program data for HIV surveillance was evaluated. METHODS: UAT and PMTCT data were compared at the same clinics and for the same time (2003 UAT survey) period. The HIV testing uptake for PMTCT was defined as the number of ANC attendees tested for HIV out of those who had their first ANC visit during the ANC surveillance period. Odds ratios and 95% confidence intervals were calculated to determine associations between demographic characteristics and HIV testing acceptance. RESULTS: Of 39 ANC-UAT sites, six had PMTCT data. PMTCT data were recorded across several logbooks with varying quality. For PMTCT, 2,239 women were offered HIV testing and 1,258 (56%) accepted; for UAT, 1,852 women were sampled. Median UAT-based HIV prevalence was 12.8% (range, 8.1%-26.3%) compared with 14.4% (range, 7.0%-27.2%) in PMTCT. HIV testing acceptance for PMTCT ranged from 48% to 69% across clinics, and was more likely among primigravidae than multigravidae. CONCLUSION: Because of varying PMTCT data quality and varying HIV testing acceptance for PMTCT, PMTCT-based HIV prevalence estimates cannot currently replace UAT-based estimates in Kenya.
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