Table 1. Patient characteristics by randomisation status.
| No intervention, N (%) | Intervention, N (%) | Test | |
|---|---|---|---|
| 11 445 (50.1) | 11 383 (49.9) | ||
| Mean IMD score (range)a | 27.4 (2.2–82.0) | 27.4 (2.2–81.6) | Wilcoxon's rank-sum test z=0.01, P>z=0.99 |
|
IMD, N (%)b | |||
| 1st quintile | 3392 (29.8) | 3392 (30.0) | χ2 for trend z=0.33, P>z=0.74 |
| 2nd quintile | 2486 (21.9) | 2384 (21.1) | |
| 3rd quintile | 1878 (16.5) | 1880 (16.6) | |
| 4th quintile | 2336 (20.5) | 2409 (21.3) | |
| 5th quintile | 1279 (11.3) | 1242 (11.0) | |
| Mean age at first offered appointment (years) | 59.0 (50–70) | 59.0 (50–70) | Wilcoxon's rank-sum test z=0.36, P>z=0.72 |
|
Age group (years), N (%) | |||
| <60 | 6179 (54.0) | 6119 (53.8) | Pearson's χ2 (1)=0.12, P=0.72 |
| 60+ | 5266 (46.0) | 5264 (46.2) | |
|
Screen type | |||
| Prevalent | 3110 (27.2) | 3154 (27.7) | Pearson's χ2 (1)=0.82, P=0.37 |
| Incident | 8335 (72.8) | 8229 (72.3) | |
|
Centre | |||
| Bolton | 5745 (50.2) | 5738 (50.4) | Pearson's χ2 (2)=0.30, P=0.86 |
| Wigan | 2835 (24.8) | 2784 (24.5) | |
| Liverpool | 2865 (25.0) | 2861 (25.1) | |
Abbreviation: IMD=index of multiple deprivation.
a
Higher score=lower socioeconomic status.
b
1st quintile=lowest socioeconomic class.