Trends in behavioural and biological measures of HIV risk, men who have sex with men, San Francisco, 1998 to 2004
| Source | Measure | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | ||
|---|---|---|---|---|---|---|---|---|---|---|
| UAI, unprotected anal intercourse, MSM, men who have sex with men. | ||||||||||
| Anonymous HIV testing sites (n = 20 589) | HIV incidence (% per year) | 1.1 | 4.1 | 2.9 | 2.8 | 2.8 | 1.7 | 3.2 | ||
| Any UAI with known HIV+ partner (%) | 14.5 | 16.0 | 15.4 | 9.3 | 7.1 | 9.5 | 9.7 | |||
| Receptive UAI with known HIV+ partner (%) | 8.1 | 9.3 | 8.7 | 4.5 | 3.4 | 4.0 | 4.3 | |||
| Insertive UAI with known HIV+ partner (%) | 13.0 | 13.9 | 13.9 | 8.1 | 6.4 | 8.1 | 8.2 | |||
| STI clinic HIV testing programme (n = 8821) | HIV incidence (% per year) | 4.6 | 4.8 | 3.3 | 3.4 | 4.4 | 4.2 | 3.6 | ||
| Any UAI with known HIV+ partner (%) | 18.8 | 9.3 | 9.0 | 12.0 | 13.1 | 13.8 | 6.2 | |||
| Receptive UAI with known HIV+ partner (%) | 15.3 | 5.8 | 6.3 | 7.8 | 8.4 | 8.1 | 2.5 | |||
| Insertive UAI with known HIV+ partner (%) | 17.9 | 8.7 | 8.4 | 10.8 | 11.8 | 12.5 | 5.3 | |||
| STOP AIDS Project (n = 16 331) | Any UAI, all MSM (%) | 30.8 | 32.3 | 35.9 | 37.8 | 33.0 | 38.6 | 34.6 | ||
| UAI with partners of unknown HIV serostatus, HIV+ MSM (%) | 21.6 | 25.3 | 25.6 | 30.7 | 27.5 | 28 | 21 | |||
| UAI with partners of unknown serostatus, HIV- MSM (%) | 11.9 | 14.8 | 17.1 | 20.2 | 15.7 | 8.0 | 4.0 | |||
| STI surveillance | Early syphilis cases (n) | 9 | 32 | 52 | 155 | 438 | 475 | 492 | ||
| Male rectal gonorrhoea cases (n) | 157 | 163 | 202 | 211 | 284 | 290 | 389 | |||