What question did this study set out to answer?

The aim is to identify risk factors related to heterosexual HIV transmission and compare the transmission efficiency between sexes.

March 28, 1992BMJOpen Access

Comparison of female to male and male to female transmission of HIV in 563 stable couples. European Study Group on Heterosexual Transmission of HIV.

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Cohort study compares HIV transmission efficiency between genders in couples, suggesting implications for prevention strategies.

The aim is to identify risk factors related to heterosexual HIV transmission and compare the transmission efficiency between sexes.
Cohort study of 563 heterosexual couples from nine European countries.
Regular interviews and testing every six months to assess HIV prevalence and transmission factors.
Partners with additional risk factors unrelated to the index patient were excluded from analysis.
12% of male partners (19) and 20% of female partners (82) were HIV infected, indicating male to female transmission is 1.9 times more effective.
Increased risk factors for female to male transmission include advanced HIV infection (OR 17.6) and sexual contact during menses (OR 3.4).
Risk factors for male to female transmission include advanced infection stage (OR 2.7), anal sex (OR 5.1), and older female partner age (OR 3.9 for age > 45 years).

A 1992 study studied this question.

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