Siddiqui 1992.

Methods	Prospective study of sexually active HIV discordant heterosexual couples (incidence estimation and associated risk factors)
Participants	‐ U.S., methadone maintenance clinics ‐ enrolled 12/88‐ 10/91 ‐ M+F‐ couples (n=16) ‐ F+M‐ couples (n=6) ‐ IC case: IVDU (only) on methadone maintenance ‐ partner exclusions: IVDU
Interventions	‐ counselling ‐ @ 3‐4mo sexual & medical history, HIV serotest
Outcomes	Vaginal condom usage ‐ every time (100%) ‐ intermittent (1‐99%) ‐ none (0%) HIV serotesting by ?
Notes	‐ 3 partners had STDs ‐ 2 couples had anal sex 1.9 times/mo