Table 1.
Characteristics of study population
| Characteristics | Birth cohort 1983 | Birth cohort 1993 |
|---|---|---|
| Number of womena | 26,331 | 34,140 |
| ‐Excluded because living in or moving to Copenhagen County | 4,507 (17%) | 6,029 (18%) |
| ‐Excluded for other reasons | 2,363 (9%) | 2,633 (8%) |
| Number of included women | 19,461 | 25,478 |
| Region of residence at study startb | ||
| Northern Denmark | 2,647 (14%) | 3,378 (13%) |
| Central Denmark | 5,389 (28%) | 7,011 (27%) |
| Southern Denmark | 5,346 (27%) | 6,786 (27%) |
| Zealand | 3,268 (17%) | 4,260 (17%) |
| Capital | 2,811 (14%) | 4,043 (16%) |
| High‐school degreec | 52% | 57% |
| Age of sexual debutd | 16 years | 16 years |
| Sexually active at age 15e | Not available | 37% |
| Smoking daily at age 15f | 21% | 10% |
| HPV‐vaccinatedg | 0% | 92% |
a
Number of women living in Denmark January 1, 1999/2009.
b
Proportion of number of included women.
c
Statistics Denmark: Proportion of women with at least high‐school degree at age 22.
d
Self‐reported sexual debut age for women born 1960–1987 (median) and 1983–1997 (mean).
e
Self‐reported sexual activity at age 15 years for girls born in 1995.
f
Self‐reported smoking status at age 15 years for girls born in 1983 and 1995, respectively.
g
HPV‐vaccination status at 1 April 2007 and 2017, respectively.