Baseline characteristics of invited individuals by participation
| Sex | Age at invitation date (years) | Invited | Participants* | Non-participants* | P value† | |||
| N | (%)‡ | n | (%) | n | (%) | |||
| All | All ages | 8009 | (100.0) | 5938 | (74.1) | 2071 | (25.9) | |
| ≤65 | 3950 | (49.3) | 2877 | (72.8) | 1073 | (27.2) | 0.008 | |
| >65 | 4059 | (50.7) | 3061 | (75.4) | 998 | (24.6) | ||
| Men | All ages | 5228 | (65.3) | 3892 | (74.4) | 1336 | (25.6) | |
| ≤65 | 2634 | (32.9) | 1901 | (72.2) | 733 | (27.8) | <0.001 | |
| >65 | 2594 | (32.4) | 1991 | (76.8) | 603 | (23.2) | ||
| Women | All ages | 2781 | (34.7) | 2046 | (73.6) | 735 | (26.4) | |
| ≤65 | 1316 | (16.4) | 976 | (74.2) | 340 | (25.8) | 0.501 | |
| >65 | 1465 | (18.3) | 1070 | (73.0) | 395 | (27.0) | ||
*Participants were individuals who gave consent, returned an analysable FIT at year 1 and did not subsequently withdraw from the study.
†P values are for the comparison of age at invitation date for participants and non-participants, overall and by sex.
‡Percentage of the total invited cohort (8009).