Characteristics of OHTN Cohort Study participants included in the analysis of chlamydia and gonorrhoea testing, 2008–2011
| All participants (n=3165) | MSM (n=2179) | |
|---|---|---|
| Mean age at baseline (SD)* | 45.5 (10.0) | 46.7 (9.9) |
| Sex | ||
| Male: MSM | 68.9% | – |
| Male: non-MSM | 12.1% | – |
| Female | 16.9% | – |
| Unknown† | 2.2% | – |
| Median year of HIV diagnosis (IQR) | 1998 (1992–2004) | 1996 (1991–2003) |
| Region of Ontario | ||
| Toronto | 83.5% | 86.5% |
| Other | 16.5% | 13.5% |
| Ethnicity | ||
| White | 61.7% | 74.1% |
| Black/African | 14.3% | 4.2% |
| Aboriginal | 4.5% | 4.4% |
| Other | 16.6% | 17.1% |
| Unknown | 3.0% | 0.2% |
| Education | ||
| High school or less | 28.6% | 23.02% |
| Trade school or college | 29.1% | 30.1% |
| University | 35.3% | 42.9% |
| Unknown | 7.0% | 3.9% |
| Income | ||
| Less than $20 000 | 39.2% | 34.7% |
| $20 000–$59 999 | 34.3% | 37.7% |
| $60 000 or more | 17.0% | 21.7% |
| Unknown | 9.3% | 5.8% |
| Median # months of prospective follow-up (IQR) | 36.0 (26.4–42.0) | 36 (27.6–43.2) |
| Median CD4 cell count/mm3 at baseline (IQR)*‡ | 470 (330–640) | 480 (340–650) |
| Antiretroviral medication any time during follow-up | 92.8% | 93.4% |
| Viral load at baseline* | ||
| Undetectable (<50 copies/mL) | 56.8% | 58.8% |
| Detectable but suppressed (50–199 copies/mL) | 7.9% | 8.0% |
| Unsuppressed (200+ copies/mL) | 34.1% | 32.2% |
| Unknown | 1.2% | 1.0% |
*Baseline was defined as the later of 1 January 2008 or the date of enrolment.
†Reasons for missing data among persons with unknown sex and MSM status: 0.16% missing data on sex; 2.04% males with missing data on history of sex with men.
‡CD4 cell count was missing for 2.4% of participants.
MSM, men who have sex with men.