Table 1.
Baseline characteristics.
| SI | SI + N | |
|---|---|---|
| N = 76,695 | N = 73,722 | |
| Median (range) | Median (range) | |
|
| ||
| Age at invitation (in years) | 65.0 (59.0–74.0) | 65.0 (59.0–74.0) |
| IMD deprivation score | 15.1 (0.5–87.8) | 15.1 (0.5–87.8) |
|
| ||
| % (n) | % (n) | |
|
| ||
| Gender | ||
| Female | 51.0 (39,086) | 51.5 (37,937) |
| Male | 49.0 (37,609) | 48.5 (35,785) |
| IMD quintile | ||
| 1st quintile (0–8.49, least deprived) | 22.3 (17,073) | 23.2 (17,027) |
| 2nd quintile (8.50–13.79) | 23.1 (17,675) | 22.5 (16,517) |
| 3rd quintile (13.80–21.35) | 21.1 (16,161) | 20.8 (15,287) |
| 4th quintile (21.36–34.17) | 17.5 (13,385) | 17.6 (12,897) |
| 5th quintile (34.18–87.80, most deprived) | 15.9 (12,127) | 16.0 (11,722) |
| Missing | 274 | 272 |
| Hub | ||
| Midlands and North West | 27.5 (21,118) | 29.1 (21,421) |
| Southern | 21.8 (16,723) | 28.0 (20,667) |
| London | 11.5 (8,795) | 11.5 (8,509) |
| North East | 16.8 (12,900) | 17.7 (13,053) |
| Eastern | 22.4 (17,159) | 13.7 (10,072) |
| Screening round | ||
| Prevalent first time invitees | 16.3 (12,510) | 20.7 (15,281) |
| Prevalent previous nonresponders | 29.8 (22,892) | 30.1 (22,209) |
| Incident episodes | 53.8 (41,293) | 49.1 (36,232) |
SI: standard information; SI + N: standard information plus narrative leaflet; IMD: index of multiple deprivation.