Table 1.
Characteristics of the Study Population for All Women, Heterosexual Men, and Unvaccinated Women
| Characteristic | All Women (n = 6354) |
Heterosexual Men (n = 2414) |
Unvaccinated Women (n = 4111) |
|||
|---|---|---|---|---|---|---|
| Age | ||||||
| 16–20 y | 2478 | (39.0) | 691 | (28.6) | 1336 | (32.5) |
| 21–24 y | 3876 | (61.0) | 1723 | (71.4) | 2775 | (67.5) |
| Self-defined ethnicity | ||||||
| Dutch | 5514 | (86.8) | 1933 | (80.1) | 3579 | (87.1) |
| Not Dutch | 837 | (13.2) | 479 | (19.9) | 530 | (12.9) |
| Educational levela | ||||||
| Low/middle | 1550 | (24.5) | 708 | (29.4) | 964 | (23.5) |
| High | 4773 | (75.5) | 1699 | (70.6) | 3133 | (76.5) |
| Sexual preference | ||||||
| Heterosexual | 6070 | (95.5) | 2414 | (100.0) | 3940 | (95.8) |
| Gay or bisexual | 284 | (4.5) | 0 | (0.0) | 171 | (4.2) |
| Age of sexual debut | ||||||
| ≤14 y | 813 | (13.0) | 405 | (16.9) | 504 | (12.4) |
| 15–16 y | 3036 | (48.3) | 961 | (40.2) | 1934 | (47.5) |
| ≥17 y | 2428 | (38.7) | 1024 | (42.9) | 1630 | (40.1) |
| No. of sex partners in past 6 mo | ||||||
| 0–1 | 1960 | (30.9) | 499 | (20.7) | 1342 | (32.7) |
| 2–3 | 3047 | (48.0) | 876 | (36.3) | 1956 | (47.6) |
| 4–5 | 947 | (14.9) | 510 | (21.1) | 591 | (14.4) |
| ≥6 | 394 | (6.2) | 529 | (21.9) | 219 | (5.3) |
| No. of lifetime sex partners | ||||||
| 0–2 | 682 | (10.9) | 130 | (5.6) | 438 | (10.8) |
| 3–4 | 1176 | (18.9) | 245 | (10.6) | 770 | (19.0) |
| 5–6 | 1220 | (19.6) | 284 | (12.3) | 789 | (19.5) |
| 7–14 | 2196 | (35.2) | 749 | (32.4) | 1417 | (35.0) |
| ≥15 | 962 | (15.4) | 903 | (39.1) | 635 | (15.7) |
| Anal sex past 6 mo | ||||||
| No | 5527 | (87.4) | 2021 | (84.8) | 3568 | (87.2) |
| Yes, insertive only | 0 | (0.0) | 351 | (14.7) | 0 | (0.0) |
| Yes, receptive only | 796 | (12.6) | 3 | (0.2) | 526 | (12.8) |
| Yes, both insertive and receptive | 0 | (0.0) | 7 | (0.3) | 0 | (0.0) |
| Notified for STIb | ||||||
| No | 5630 | (89.1) | 1992 | (82.9) | 3684 | (90.0) |
| Yes | 688 | (10.9) | 410 | (17.1) | 408 | (10.0) |
| STI-related symptomsb | ||||||
| No | 4818 | (76.4) | 1742 | (72.7) | 3100 | (75.9) |
| Yes | 1491 | (23.6) | 655 | (27.3) | 984 | (24.1) |
| Self-reported history of any STI | ||||||
| No | 3549 | (56.2) | 1298 | (54.0) | 2361 | (57.6) |
| Yes | 1683 | (26.6) | 508 | (21.1) | 1087 | (26.6) |
| Never tested | 1089 | (17.2) | 598 | (24.9) | 648 | (15.8) |
| Genital chlamydia infectionb | ||||||
| No | 5403 | (85.5) | 2010 | (83.8) | 3534 | (86.4) |
| Yes | 914 | (14.5) | 388 | (16.2) | 557 | (13.6) |
| Steady partner | ||||||
| No | 3883 | (62.6) | 1359 | (58.3) | 2470 | (61.5) |
| Yes, for 0–5 mo | 1366 | (22.0) | 584 | (25.1) | 908 | (22.6) |
| Yes, ≥6 mo | 959 | (15.4) | 386 | (16.6) | 641 | (15.9) |
| Condom use past 6 mo, casual partnerc | ||||||
| Inconsistent | 2624 | (41.5) | 1139 | (47.6) | 1601 | (39.1) |
| Consistent | 2243 | (35.5) | 810 | (33.8) | 1525 | (37.2) |
| No casual partners past 6 mo | 1455 | (23.0) | 445 | (18.6) | 972 | (23.7) |
Data are presented as No. (%). Numbers vary because of missing values.
Abbreviation: STI, sexually transmitted infection.
aHigh 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.
bBased on information of the sexual health center visit.
cInconsistent included reporting never, rarely, and “sometimes I do, sometimes I do not” condom use. Consistent included reporting often or always condom use.