All couples | 171 | 100.0 |
Sex of the initially uninfected partner | | |
Men | 19 | 11.1 |
Women | 152 | 88.9 |
Age at the beginning of follow up, mean (range) | 29.3 (18–49) |
Number of years of relationship with partner previous to beginning of follow up, median (range) | 3.0 (0–27.4) |
People with sexual risk exposures | 139 | 81.3 |
Vaginal or anal penetrations without condom* | 74 | 43.3 |
Breaking or slipping of condom during vaginal or anal sex* | 47 | 27.5 |
Unprotected orogenital sex* | 119 | 69.6 |
People who had no unprotected sexual contact | 32 | 18.7 |
Events that occurred during follow up (529 person years) | | |
Women who became pregnant | 31 | 18.1 |
Seroconversions to HIV | 1 | 0.6 |
Seroconversions to HCV | 0 | 0 |
AIDS stage in index case | 24 | 14.0 |
CD4+ cell count lower than 200 × 106/l | 28 | 16.4 |