Table 1. Distribution of the study population and DR (with 95% CI) by screening programme.
| Screening programme | Starting year | No. of women (%) | Person-years | No. of cases | DR (95% CI) |
|---|---|---|---|---|---|
| Firenze | 1986 | 162 314 (56) | 1 273 442 | 824 | 6.47 (6.04–6.93) |
| Torino | 1992 | 54 367 (19) | 225 546 | 69 | 3.06 (2.42–3.87) |
| Mantova | 1993 | 23 571 (8) | 92 632 | 79 | 8.53 (6.84–10.63) |
| Ravenna | 1995 | 19 476 (7) | 55 933 | 57 | 10.19 (7.86–13.21) |
| Ferrara | 1996 | 22 181 (8) | 52 011 | 80 | 15.38 (12.36–19.15) |
| Viterbo | 1997 | 5421 (2) | 14 986 | 1 | 0.67 (0.09–4.74) |
| Total | — | 287 330 | 1 714 550 | 1110 |
CI=confidence interval; DR=detection rate.