Table 1. Baseline sample characteristics.
| Standard BCSP invitation+GPE | Standard BCSP invitation | |
|---|---|---|
| N=131 423 | N=134 011 | |
| Median (range) | Median (range) | |
| Age (years)a | 65 (59–74) | 65 (59–74) |
| IMD deprivation score | 14.7 (0.5–87.8) | 14.6 (0.5–87.8) |
| % (n) | % (n) | |
|
Sex | ||
| Female | 51.0 (66 986) | 51.2 (68 591) |
| Male | 49.0 (64 437) | 48.8 (65 420) |
|
IMD quintileb | ||
| 1 (Least deprived) | 23.1 (30 350) | 23.3 (31 381) |
| 2 | 23.6 (30 952) | 23.4 (31 340) |
| 3 | 21.3 (27 950) | 21.0 (28 181) |
| 4 | 17.1 (22 450) | 17.2 (23 007) |
| 5 (Most deprived) | 14.6 (19 174) | 14.6 (19 540) |
| Missing | 547 | 562 |
|
Hub | ||
| BCS01 | 27.4 (35 993) | 25.8 (34 598) |
| BCS02 | 24.2 (31 760) | 30.3 (40 550) |
| BCS03 | 9.0 (11 818) | 9.9 (13 255) |
| BCS04 | 16.2 (21 272) | 16.0 (21 439) |
| BCS05 | 23.3 (30 580) | 18.0 (24 169) |
|
Screening episode | ||
| Incident | 52.3 (68 695) | 52.3 (70 134) |
| Prevalent first time invitees | 17.0 (22 287) | 17.6 (23 582) |
| Prevalent previous non-responders | 30.8 (40 441) | 30.1 (40 295) |
Abbreviations: BCSP=Bowel Cancer Screening Programme; GPE=GP endorsement; IMD=Index of Multiple Deprivation.
a
Some subjects were invited just before their 60th birthday.
b
Quintile based on national distributions using pre-defined national cut-offs.