Table 1. Person-years, number of cervical cancers, incidence density and incidence density ratio (IDR) among not invited and invited women and, within invited, among attenders and nonattenders.
| Person-years | Cancer casesa | Crude incidence (per 105 py) | Age-standardised incidenceb | IDRc | 95% CI | |
|---|---|---|---|---|---|---|
| Not invited | 1 265 075 | 118 | 9.3 | 8.6 | 1.0 | |
| Invited | 918 862 | 72 | 7.8 | 6.9 | 0.81 | 0.59–1.09 |
| Invited nonattenders | 570 186 | 61 | 10.7 | 9.5 | 1.0 | |
| Invited attenders | 348 676 | 11 | 3.2 | 3.0 | 0.25 | 0.13–0.50 |
a
Cases with morphology specified as nonsquamous or staged as microinvasive excluded.
b
Standardised on the world population truncated 24–69 years, per 100 000 py.
c
Adjusted for age in 5-year groups by Poisson regression.