Relevantní úryvek originálu v angličtině:

The most recent analysis by Davis and Weller (28) was evaluated. This analysis, in which only longitudinal or cohort studies were included, used the following criteria to select studies related to condom use and HIV/AIDS prevention:

(1) Sample included serodiscordant, sexually active, heterosexual couples;

(2) HIV status was determined by serology (so that exposure to HIV was known);

(3) Data collection included self report about condom use; and

(4) Study design afforded longitudinal follow-up of HIV uninfected partner.

Studies with insufficient condom use information and/or duplicate or interim reports on the same cohort were excluded.

Davis and Weller found twelve studies, which met these criteria (139, 29, 30, 150, 155, 158, 160, 161, 165, 108, 171, 173). The meta-analysis noted the direction of transmission (male-to-female, female-to-male, and unstated) and date of study enrollment. Condom usage was classified into the following three categories: always (100% use), sometimes, and never.

Among participants who reported always using condoms, the summary estimate of HIV/AIDS incidence from the twelve studies was 0.9 seroconversion per 100 person years. Among those who reported never using condoms, the summary estimate of HIV/AIDS incidence from the seven studies was 6.7 seroconversions per 100 person years. Overall, Davis and Weller estimated that condoms provided an 85% reduction in HIV/AIDS transmission risk when infection rates were compared in always versus never users.