2012 impact survey
The impact survey in all the 77 trial clusters took place from August to November 2012. In each cluster, trained fieldworkers interviewed and obtained finger prick dried blood spot (DBS) samples from approximately 100 young women and men aged 15-29 years. The questionnaire covered: attitudes about gender, gender violence and HIV; sexual behaviour; and experience or perpetration of intimate partner violence and forced sex.
The fieldworkers undertaking the interviews in the impact survey were unaware of the intervention status of each cluster.
Data entry for all three countries took place in Botswana, using double data entry with validation to minimise keystroke errors. Further cleaning will look for logical inconsistencies and out of range responses and check back to the data collection registers as necessary.
The National Institute for Communicable Diseases in Johannesburg will test the DBS samples for HIV antibodies, and test the confirmed positive samples for evidence of recent (“incident”) infection. Barcode labels will link the HIV test results to individual questionnaire records. HIV testing results are expected in early 2013.
Analysis in 2013 will compare the primary outcome (HIV incidence among young women aged 15-29 years) between the intervention and control communities. We will also examine impact on intermediate outcomes, including gender violence, sexual behaviour, and relevant attitudes.
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