Incidence (I/10 5 ) and 10 year cumulative incidence rate (CR) of cervical intraepithelial neoplasia grade III and invasive cervical cancer in primiparous women resident in the Helsinki metropolitan area during 1983–94
| Follow up time (years) | |||||
|---|---|---|---|---|---|
| 0–5 | 6–10 | 0–10 | CR | ||
| Age group (years) | No of women | I/105 | I/105 | I/105 | % |
| ≤17 | 14 027 | 31.0 | 70.1 | 43.9 | 0.33 |
| 18–19 | 9 092 | 52.2 | 65.6 | 56.5 | 0.44 |
| 20–24 | 28 852 | 28.3 | 32.7 | 29.7 | 0.21 |
| 25–29 | 14 732 | 23.3 | 7.3 | 18.3 | 0.12 |
| 30 | 6 088 | 32.2 | — | 21.8 | 0.16 |
| <25 | 51 971 | 33.1 | 48.1 | 38.0 | 0.28 |