Table 1.
Characteristics of the Study Population and a Comparison Between Vaccinated and Unvaccinated Women
| Total | Unvaccinated | Vaccinated (≥1 dose) | ||
|---|---|---|---|---|
| n (%) | n (%) | n (%) | P valuea | |
| Total | 1087 | 438 | 649 | |
| Age | .50 | |||
| 16–18 years | 325 (29.9) | 136 (31.1) | 189 (29.1) | |
| 19–22 years | 762 (70.1) | 302 (68.9) | 460 (70.9) | |
| Ethnicity | <.01 | |||
| Native Dutch | 854 (78.9) | 311 (71.3) | 543 (83.9) | |
| Not native Dutch | 229 (21.1) | 125 (28.7) | 104 (16.1) | |
| Education level b | <.01 | |||
| Low/middle | 344 (31.7) | 171 (39.0) | 173 (26.7) | |
| High | 742 (68.3) | 267 (61.0) | 475 (73.3) | |
| Recent sex partners c | .02 | |||
| 0–1 partner | 310 (28.5) | 145 (33.1) | 165 (25.4) | |
| 2–3 partners | 538 (49.5) | 206 (47.0) | 332 (51.2) | |
| ≥4 partners | 239 (22.0) | 87 (19.9) | 152 (23.4) | |
| Lifetime sex partners | .24 | |||
| 0–3 partners | 288 (26.9) | 127 (29.5) | 161 (25.1) | |
| 4–6 partners | 346 (32.3) | 137 (31.9) | 209 (32.6) | |
| ≥7 partners | 438 (40.9) | 166 (38.6) | 272 (42.4) | |
| Age sexual debut d | .06 | |||
| ≤14 years | 192 (17.8) | 91 (21.0) | 101 (15.7) | |
| 15–16 years | 558 (51.8) | 221 (51.0) | 337 (52.3) | |
| ≥17 years | 327 (30.4) | 121 (27.9) | 206 (32.0) | |
| History of sexually transmitted infections | .03 | |||
| No | 575 (53.1) | 213 (48.9) | 362 (56.0) | |
| Yes | 241 (22.3) | 113 (25.9) | 128 (19.8) | |
| Never tested | 267 (24.7) | 110 (25.2) | 157 (24.3) | |
| Current genital chlamydia/gonorrhea | .90 | |||
| No | 889 (82.1) | 357 (82.3) | 532 (82.0) | |
| Yes | 194 (17.9) | 77 (17.7) | 117 (18.0) | |
| Condom use with casual partners c | .32 | |||
| (Usually) not | 510 (47.0) | 199 (45.5) | 311 (48.1) | |
| (Usually) yes | 336 (31.0) | 132 (30.2) | 204 (31.5) | |
| No casual partners | 238 (22.0) | 106 (24.3) | 132 (20.4) | |
| Ever used hormonal contraceptives | <.01 | |||
| No | 43 (4.0) | 26 (6.0) | 17 (2.6) | |
| Yes | 1029 (96.0) | 404 (94.0) | 625 (97.4) |
a
Comparing women vaccinated at least once with unvaccinated women.
b
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.
c
In the past 6 months.
d
Vaginal or anal intercourse.
Numbers do not always add up to 100% because of missing values.