Baseline characteristics of HIV-negative and HIV-unknown status participants by PrEP use in past 6 months, Engage cohort study (n=2009)
| Characteristics | Overall | PrEP use in the last 6 months | ||
| n (%)* | Yes (%)* | No (%)* | P value† | |
| 2009 | 363 (18.1) | 1646 (81.9) | ||
| Recruiting city | <0.001 | |||
| Montreal | 968 (48.2) | 124 (34.2) | 844 (51.3) | |
| Toronto | 419 (20.9) | 89 (24.5) | 330 (20.0) | |
| Vancouver | 622 (30.9) | 150 (41.3) | 472 (28.7) | |
| Race/ethnicity | 0.675 | |||
| White | 1404 (69.9) | 257 (70.8) | 1147 (69.7) | |
| Men of colour | 605 (30.1) | 106 (29.2) | 499 (30.3) | |
| Education | <0.001 | |||
| High school or less | 295 (14.8) | 31 (8.5) | 264 (16.1) | |
| Some college | 636 (31.8) | 97 (26.7) | 539 (33.0) | |
| Bachelor’s degree and above | 1068 (53.4) | 235 (64.7) | 833 (50.9) | |
| Income, CAD, last year | <0.001 | |||
| Less than $40 000 | 1235 (61.5) | 177 (48.8) | 1058 (64.3) | |
| $40 000–$79 900 | 595 (29.6) | 129 (35.5) | 466 (28.3) | |
| $80 000 or more | 179 (8.9) | 57 (15.7) | 122 (7.4) | |
| Sexual identity | <0.001 | |||
| Gay | 1631 (81.2) | 325 (89.5) | 1306 (79.3) | |
| Bisexual | 140 (7.0) | 13 (3.6) | 127 (7.7) | |
| Other | 238 (11.8) | 25 (6.9) | 213 (13.0) | |
| Relationship status | 0.064 | |||
| Single | 1447 (72.0) | 245 (67.5) | 1202 (73.0) | |
| Married/common-law | 428 (21.3) | 86 (23.7) | 342 (20.8) | |
| Separated/divorced/widowed | 134 (6.7) | 32 (8.8) | 102 (6.2) | |
| STI diagnosis (gonorrhoea or chlamydia or syphilis) | <0.001 | |||
| Not detected | 1807 (89.9) | 300 (82.6) | 1507 (91.6) | |
| Detected | 202 (10.1) | 63 (17.4) | 139 (8.4) | |
| STI diagnosis (gonorrhoea) | 0.001 | |||
| Not detected | 1544 (94.6) | 266 (90.8) | 1278 (95.4) | |
| Detected | 88 (5.4) | 27 (9.2) | 61 (4.6) | |
| STI diagnosis (chlamydia) | <0.001 | |||
| Not detected | 1530 (93.7) | 258 (88.4) | 1272 (94.8) | |
| Detected | 103 (6.3) | 34 (11.6) | 69 (5.2) | |
| STI diagnosis (syphilis) | ||||
| Not detected | 1988 (98.9) | 358 (98.6) | 1630 (99.0) | 0.492 |
| Detected | 21 (1.1) | 5 (1.4) | 16 (1.0) | |
| Sexual behaviours, past 6 months | ||||
| Condomless anal sex | <0.001 | |||
| None | 626 (31.2) | 27 (7.4) | 599 (36.4) | |
| Yes, at least once | 1383 (68.8) | 336 (92.6) | 1047 (63.6) | |
| Oral sex | 0.162 | |||
| No | 55 (2.7) | 6 (1.7) | 49 (3.0) | |
| Yes | 1954 (97.3) | 357 (98.3) | 1597 (97.0) | |
| Median/IQR | P value‡ | |||
| Number of anal sex partners, last 6 months | 3 (1–8) | 10 (5–24) | 2 (1–5) | <0.001 |
| Age, in years | 31 (26–39) | 33 (28–39) | 30 (26–39) | <0.001 |
True point prevalence is presented in Hart et al.13 Percentages and statistics are crude, not adjusted for RDS weights.
*Column percentages.
†2 or Fisher’s exact test.
‡Wilcoxon rank-sum (Mann-Whitney) test.
CAD, Canadian dollar; PrEP, pre-exposure prophylaxis; RDS, respondent-driven sampling.