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. 2017 Nov 20;7(11):e016232. doi: 10.1136/bmjopen-2017-016232

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HIV prevalence by household wealth quintiles. Data were derived from the Prevention of Mother to Child Transmission of HIV, Effectiveness in Africa and, Research and Linkages to HIV Care survey (PEARL study).^23–28 FSP, study participants from the Free State Province; WCP, study participants from the Western Cape Province. Both=data for both WCP and FSP. Household wealth quintiles were generated separately for each province using data for the specified province only. The wider CI for WCP than FSP is due to clustering, as described in text. Furthermore, note that WCP had larger probability weights, used in weighting of the survey-derived data than FSP, as described in text.