Descriptive systematic review of Sub-Saharan African studies on the association between alcohol use and HIV infection.

The purpose of this review was to identify and assess studies that have quantified the association between alcohol consumption and HIV infection in sub-Saharan Africa. PubMed, CAB Abstracts and article references were searched to identify studies published in English between 2000 and 2008 that reported relative measures of the association between alcohol use and HIV prevalence and/or seroconversion rates. Twenty-one eligible studies were described in detail and information on study characteristics extracted. All of the identified studies were conducted either in east or southern Africa, and varied substantially regarding study population and alcohol use definitions. Overall, users of alcohol and especially problem drinkers were more likely to be HIV seropositive (HIV+) than non-users, frequency or quantity of alcohol use was positively associated with HIV prevalence, and the association varied by gender. The use of alcohol in sexual contexts was significantly associated with an increased risk of HIV acquisition and prevalence. The findings of this review of sub-Saharan African research strongly support an association between alcohol consumption and HIV infection. Although a causal relationship could not be established with certainty from the mainly cross-sectional studies, the negative consequences of such an association have profound implications for the burden of disease in this region. To confirm causality, future research should use prospective study designs, use clearly defined standardised measures of alcohol use (and problematic drinking) and an 'event-specific' approach to examine the situational links between alcohol use and HIV acquisition.