Table 3.
Participation in screening.
| Screening participation age 50–64y | Aged 65-69y |
Aged 70-74y |
Aged 75-79y |
Aged 80-84y |
Aged 65-84y |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cases (N) | PYa 1000's | Risk per 1000 PYa (95% CI) | Cases (N) | PYa 1000's | Risk per 1000 PYa (95% CI) | Cases (N) | PYa 1000's | Risk per 1000 PYa (95% CI) | Cases (N) | PYa 1000's | Risk per 1000 PYa (95% CI) | 20-year cumulative absolute risk per 1000 PYa | 20-year differenceb in absolute risk per 1000 PYa (95% CI) | |
| No screening | 485 | 1237 | 0.39 (0.34, 0.46) | 295 | 1007 | 0.29 (0.25, 0.35) | 295 | 975 | 0.30 (0.26, 0.36) | 134 | 548 | 0.24 (0.19–0.31) | 6.16 (5.64, 6.72) | – |
| Screened irregularly | 249 | 2255 | 0.11 (0.10, 0.13) | 223 | 1632 | 0.14 (0.12, 0.16) | 294 | 2195 | 0.13 (0.12, 0.15) | 202 | 1559 | 0.13 (0.11–0.15) | 2.55 (2.35, 2.76) | 3.61 (3.08, 4.23) |
| Screened regularly | 266 | 5557 | 0.05 (0.04, 0.06) | 286 | 4032 | 0.07 (0.06, 0.08) | 228 | 2403 | 0.10 (0.08, 0.11) | 60 | 564 | 0.11 (0.08–0.14) | 1.60 (1.43, 1.79) | 4.56 (4.02, 5.16) |
Annual and 20-year cumulative risk of cervical cancer per 1000 women (with a cervix) by age at diagnosis and screening participation age 50–64y. Constrains were not necessary.
a
Person years.
b
Relative to “no screening”: Amount by which risk is lower.