Table 1.
Characteristics of HIV-positive MSM included in the analysis, OHTN Cohort Study, 2006–2010
| Analysis of first syphilis diagnosis | Analysis of syphilis re-diagnosis | Combined analysis of new syphilis diagnosis | ||||
|---|---|---|---|---|---|---|
| n | % | n | % | n | % | |
| Total N | 1799 | 100 | 586 | 100 | 2271 | 100 |
| Mean age at baseline (SD) (a) | 45.2 | 9.2 | 47.1 | 10.5 | 45.9 | 9.5 |
| Sexual orientation | ||||||
| Gay | 1360 | 75.6 | 493 | 84.1 | 1752 | 77.1 |
| Bisexual | 129 | 7.2 | 27 | 4.6 | 151 | 6.6 |
| Heterosexual | 75 | 4.2 | 7 | 1.2 | 81 | 3.6 |
| Unknown (b) | 235 | 13.1 | 59 | 10.1 | 287 | 12.6 |
| Race | ||||||
| White | 1311 | 72.9 | 423 | 72.2 | 1654 | 72.8 |
| Black/African | 54 | 3 | 27 | 4.6 | 77 | 3.4 |
| Multiple | 138 | 7.7 | 52 | 8.9 | 177 | 7.8 |
| Indigenous | 111 | 6.2 | 20 | 3.4 | 126 | 5.5 |
| Other | 116 | 6.4 | 51 | 8.7 | 157 | 6.9 |
| Unknown | 69 | 3.8 | 13 | 2.2 | 80 | 3.5 |
| Education (c) | ||||||
| High school or less | 395 | 22 | 111 | 18.9 | 493 | 21.7 |
| Trade school or college | 498 | 27.7 | 179 | 30.5 | 633 | 27.9 |
| University | 680 | 37.8 | 242 | 41.3 | 871 | 38.4 |
| Unknown (b) | 226 | 12.6 | 54 | 9.2 | 274 | 12.1 |
| Annual personal income (c) | ||||||
| Less than $20,000 CDN | 565 | 31.4 | 188 | 32.1 | 716 | 31.5 |
| $20,000 to $59,999 CDN | 631 | 35.1 | 213 | 36.3 | 799 | 35.2 |
| $60,000 CDN or more | 353 | 19.6 | 122 | 20.8 | 452 | 19.9 |
| Unknown (b) | 250 | 13.9 | 63 | 10.8 | 304 | 13.4 |
| Region where receiving HIV care | ||||||
| Toronto | 1224 | 68 | 474 | 80.9 | 1598 | 70.4 |
| Ottawa | 193 | 10.7 | 50 | 8.5 | 237 | 10.4 |
| Elsewhere in Ontario | 382 | 21.2 | 62 | 10.6 | 436 | 19.2 |
| Year of HIV diagnosis | ||||||
| Median (IQR) | 1997 | (91,03) | 1997 | (91,03) | 1996 | (91,03) |
| Diagnosed in 2006–09 | 177 | 9.8 | 56 | 9.6 | 214 | 9.4 |
| Clinical status at baseline (a) | ||||||
| Initiated antiretroviral treatment | 1952 | 86.0 | 1546 | 85.9 | 491 | 83.8 |
| Mean CD4 cell count/mm3 (SD) | 497.1 | 261.6 | 491.3 | 252.4 | 497.1 | 261.6 |
| Undetectable viral load (d) | 1173 | 65.2 | 363 | 61.9 | 1473 | 64.9 |
MSM Men who have sex with men, SD Standard deviation, IQR Interquartile range
(a) Baseline was the later of January 1, 2006 or the date of enrolment in the cohort
(b) Unknowns include men who were not interviewed
(c) As reported at the participant’s first interview in 2007–2010, available for 1967/2271 men
(d) Undetectable viral load defined as <50 copies/mL in 2006–2009 and <40 copies/mL in 2010