Table 2.
Screening participation at 6 months after intervention, stratified by screening centre, age group and previous participation status
| Screened/invited (%) |
||||
|---|---|---|---|---|
| Control (N=510) | Intervention (N=526) | RD (95% CI) | RR (95% CI) | |
| All | 102/510 (20.0) | 196/526 (37.3) | 0.173 (0.119 to 0.227) | 1.86 (1.52 to 2.29) |
| Centre | ||||
| Oslo | 75/382 (19.6) | 137/393 (34.9) | 0.152 (0.091 to 0.214) | 1.78 (1.39 to 2.27) |
| Drammen | 12/64 (18.8) | 28/63 (44.4) | 0.257 (0.101 to 0.413) | 2.37 (1.33 to 4.23) |
| Fredrikstad | 15/64 (23.4) | 31/70 (44.3) | 0.208 (0.053 to 0.364) | 1.89 (1.13 to 3.16) |
| Age group | ||||
| 27–39 | 42/197 (21.3) | 66/198 (33.3) | 0.120 (0.033 to 0.207) | 1.56 (1.12 to 2.18) |
| 40–54 | 33/181 (18.2) | 76/182 (41.8) | 0.235 (0.144 to 0.326) | 2.29 (1.61 to 3.26) |
| 55–69 | 27/132 (20.5) | 54/146 (37.0) | 0 165 (0.061 to 0.270) | 1.81 (1.22 to 2.69) |
| Previous participation | ||||
| Yes | 97/396 (24.5) | 180/422 (42.7) | 0.182 (0.118 to 0.245) | 1.74 (1.42 to 2.14) |
| No | 5/114 (4.4) | 16/104 (15.4) | 0.110 (0.031 to 0.189) | 3.51 (1.33 to 9.24) |
RD, risk difference; RR, risk ratio.