Demographic characteristics of the cohorts subjected to Finnish Cancer Registry follow-up.
| Category | HPV-16/18 vaccinated (n = 2 472) | HAV-vaccinated (n=2 399) | Unvaccinated (n=15 627) |
| Age at enrolment | 16–17 years | 16–17 years | 18–19 years |
| Age at passive follow-up | 22–28 years | 22–28 years | 22–28 years |
| Response rate* | 1 107 (46.5%) | 1 010 (42.1%) | 7 118 (45.5%) |
| Sexual debut (mean age) | 15.8 years | 16.0 years | 16.4 years |
| No. of life-time partners | |||
| 0 | 37 (3.3%) | 32 (3.2%) | 400 (5.6%) |
| 1 | 143 (12.9%) | 146 (14.5%) | 1 335 (18.8%) |
| 2 | 131 (11.8%) | 114 (11.3%) | 750 (10.5%) |
| 3–9 | 511 (46.2%) | 458 (45.3%) | 3 023 (42.4%) |
| 10 or more | 284 (25.7%) | 257 (25.4%) | 1 588 (22.3%) |
| No. of partners in the past 12 months | |||
| 0 | 531 (49.8%) | 507 (50.2%) | 3 848 (54.1%) |
| 1 | 237 (21.4%) | 230 (22.8%) | 1 365 (19.2%) |
| 2 | 111 (10.1%) | 92 (9.1%) | 580 (8.1%) |
| three or more | 170 (15.4%) | 145 (14.4%) | 914 (12.8%) |
| Use of contraception | |||
| BCP (ever) | 1 028 (92.9%) | 920 (91.1%) | 6 017 (84.5%) |
| Condom† | |||
| use | 298 (26.9%) | 261 (25.8%) | 2 004 (28.2%) |
| no use | 787 (71.1%) | 728 (72.1%) | 4 977 (69.5%) |
| No contraception | 1 (0.1%) | 5 (0.5%) | 56 (0.8%) |
*returned questionnaires at the age of 22–23 years when the passive follow-up was started
†last year