HIV incidences among MSM of the HIV-PEP cohort and of the Amsterdam Cohort Studies (ACS), 2000–2009
| HIV-PEP cohort | ACS | ||||||
| Time period | No. of serocon-versions | Person Years (PY) under observation | Incidence density per 100 PY (95% CI) | No. of serocon-versions | Person Years (PY) under observation | Incidence density per 100 PY (95% CI) | p Value |
| 2000–2004 | 1 | 42.1 | 2.38 (0.12 to 11.73) | 26 | 2095 | 1.24 (0.83 to 1.79) | NS |
| 2005–2009 | 10 | 127.4 | 7.85 (4.0 to 14.0) | 44 | 2317 | 1.90 (1.40 to 2.53) | <0.001 |
| Total study period 2000–2009 | 11 | 169.5 | 6.49 (3.4 to 11.3) | 70 | 4412 | 1.59 (1.25 to 2.0) | <0.001 |
NS: Not Significant.