Table 1.
Characteristics of the study population of all PASSYON years combined for all women, heterosexual men and unvaccinated women
| All women | Heterosexual men | Unvaccinated women | |
|---|---|---|---|
| N (%) | N (%) | N (%) | |
| Total | 4,996 | 1,901 | 3,594 |
| Age | |||
| 16–20 years | 2,012 (40.3) | 557 (29.3) | 1,186 (33.0) |
| 21–24 years | 2,984 (59.7) | 1,344 (70.7) | 2,408 (67.0) |
| Self‐defined ethnicity | |||
| Dutch | 4,319 (86.5) | 1,522 (80.1) | 3,127 (87.1) |
| Not Dutch | 675 (13.5) | 377 (19.9) | 465 (12.9) |
| Education level 1 | |||
| Low/middle | 1,246 (25.1) | 591 (31.2) | 835 (23.3) |
| High | 3,719 (74.9) | 1,303 (68.8) | 2,745 (76.7) |
| Sexual preference | |||
| Heterosexual | 4,804 (96.2) | 1,901 (100) | 3,457 (96.2) |
| Gay or bisexual | 192 (3.8) | ‐ | 137 (3.8) |
| Age sexual debut 2 | |||
| ≤14 years | 647 (13.1) | 322 (17.1) | 439 (12.3) |
| 15–16 years | 2,396 (48.5) | 762 (40.5) | 1,697 (47.7) |
| ≥17 years | 1,898 (38.4) | 799 (42.4) | 1,423 (40.0) |
| Sex partners past 6 months 3 | |||
| 0–1 partner | 1,627 (32.6) | 418 (22.0) | 1,203 (33.5) |
| 2–3 partners | 2,412 (48.3) | 715 (37.6) | 1,721 (47.9) |
| 4–5 partners | 687 (13.8) | 390 (20.5) | 499 (13.9) |
| ≥6 partners | 265 (5.3) | 378 (19.9) | 169 (4.7) |
| Lifetime sex partners 3 | |||
| ≤2 partners | 570 (11.6) | 105 (5.8) | 396 (11.2) |
| 3–4 partners | 973 (19.8) | 202 (11.1) | 688 (19.4) |
| 5–6 partners | 966 (19.7) | 240 (13.2) | 694 (19.6) |
| 7–14 partners | 1,702 (34.7) | 585 (32.2) | 1,245 (35.2) |
| ≥15 partners | 693 (14.1) | 687 (37.8) | 516 (14.6) |
| Anal sex past 6 months | |||
| No | 4,351 (87.6) | 1,590 (84.8) | 3,122 (87.3) |
| Yes | 614 (12.4) | 284 (15.2) | 455 (12.7) |
| Notified for STI 4 | |||
| No | 4,511 (90.6) | 1,608 (85.0) | 3,263 (91.1) |
| Yes | 467 (9.4) | 284 (15.0) | 319 (8.9) |
| STI related symptoms 4 | |||
| No | 3,799 (76.5) | 1,367 (72.4) | 2,721 (76.1) |
| Yes | 1,170 (23.5) | 521 (27.6) | 853 (23.9) |
| Self‐reported history of any STI | |||
| No | 2,852 (57.4) | 1,055 (55.7) | 2,101 (58.7) |
| Yes | 1,266 (25.5) | 377 (19.9) | 920 (25.7) |
| Never tested | 851 (17.1) | 462 (24.4) | 558 (15.6) |
| Genital chlamydia infection 4 | |||
| No | 4,283 (86.1) | 1,594 (84.4) | 3,098 (86.5) |
| Yes | 694 (13.9) | 294 (15.6) | 482 (13.5) |
| Steady partner | |||
| No | 2,961 (60.7) | 1,037 (56.5) | 2,127 (60.6) |
| Yes, for 0–6 months | 1,102 (22.6) | 475 (25.9) | 801 (22.8) |
| Yes, for ≥6 months | 813 (16.7) | 324 (17.6) | 583 (16.6) |
| Condom use past 6 months, casual partner 5 | |||
| Inconsistent | 1,950 (39.2) | 851 (44.9) | 1,344 (37.5) |
| Consistent | 1,806 (36.3) | 658 (34.7) | 1,361 (37.9) |
| No casual partners | 1,224 (24.6) | 385 (20.3) | 882 (24.6) |
Abbreviations: STI: sexually transmitted infection.
Numbers vary because of missing values.
High educational level included school of higher general secondary education, pre‐university education, university of applied sciences and university. Low/middle educational level included all other levels of education.
Categorized for analyses purposes. Minimum‐maximum age reported: 9–24 years among (unvaccinated) women and heterosexual men.
Categorized for analyses purposes. Maximum partners reported: 540 past 6 months and 900 lifetime partners among (unvaccinated) women; 50 past 6 months and 400 lifetime partners among heterosexual men.
Based on information of the STI clinic visit.
Inconsistent included reporting never, rarely and “sometimes I do, sometimes I do not” condom use. Consistent included reporting often or always condom use.