Table 1.
Participation in the colorectal cancer screening programme by individuals’ characteristics
| Total | Colorectal cancer screening programme | p | |||||
|---|---|---|---|---|---|---|---|
| Non-participation | Participation | ||||||
| n | % | n | % | n | % | ||
| Sex | <0.001 | ||||||
| Male | 16,650 | 46.0% | 9059 | 54.4% | 7591 | 45.6% | |
| Female | 19,558 | 54.0% | 9745 | 49.8% | 9813 | 50.2% | |
| Age, years (mean, SD) | 58.8 | 5.5 | 58.5 | 5.6 | 59.1 | 5.5 | <0.001 |
| Age groups (years) | <0.001 | ||||||
| 50–54 | 10,561 | 29.2% | 5898 | 55.8% | 4663 | 44.2% | |
| 55–59 | 9492 | 26.2% | 4961 | 52.3% | 4531 | 47.7% | |
| 60–64 | 8757 | 24.2% | 4215 | 48.1% | 4542 | 51.9% | |
| 65–69 | 7398 | 20.4% | 3730 | 50.4% | 3668 | 49.6% | |
| Socioeconomic deprivation index (quintiles) | <0.001 | ||||||
| Q1 | 6665 | 18.4% | 3732 | 56.0% | 2933 | 44.0% | |
| Q2 | 6949 | 19.2% | 3551 | 51.1% | 3398 | 48.9% | |
| Q3 | 6969 | 19.2% | 3293 | 47.3% | 3676 | 52.7% | |
| Q4 | 6963 | 19.2% | 3482 | 50.0% | 3481 | 50.0% | |
| Q5 | 6397 | 17.7% | 3667 | 57.3% | 2730 | 42.7% | |
| Unknown | 2265 | 6.3% | |||||
| Visits to primary care | <0.001 | ||||||
| None | 8248 | 22.8% | 5406 | 65.5% | 2842 | 34.5% | |
| 1–2 | 5880 | 16.2% | 3296 | 56.1% | 2584 | 43.9% | |
| 3–4 | 5369 | 14.8% | 2604 | 48.5% | 2765 | 51.5% | |
| > =5 | 16,711 | 46.2% | 7498 | 44.9% | 9213 | 55.1% | |
| CRG status | <0.001 | ||||||
| Healthy | 8020 | 22.1% | 4858 | 60.6% | 3162 | 39.4% | |
| Acute disease | 64 | 0.2% | 38 | 59.4% | 26 | 40.6% | |
| Minor chronic disease | 4090 | 11.3% | 2080 | 50.9% | 2010 | 49.1% | |
| Multiple minor chronic diseases | 2622 | 7.2% | 1083 | 41.3% | 1539 | 58.7% | |
| Single dominant chronic disease | 9695 | 26.8% | 4922 | 50.8% | 4773 | 49.2% | |
| Two dominant chronic disease | 10,629 | 29.4% | 5205 | 49.0% | 5424 | 51.0% | |
| Three or more dominant chronic disease | 452 | 1.2% | 270 | 59.7% | 182 | 40.3% | |
| Malignancies | 406 | 1.1% | 219 | 53.9% | 187 | 46.1% | |
| Catastrophic condition | 230 | 0.6% | 129 | 56.1% | 101 | 43.9% | |
| Collapsed CRG | <0.001 | ||||||
| Healthy or acute disease | 8084 | 22.3% | 4896 | 60.6% | 3188 | 39.4% | |
| Minor chronic diseases | 6712 | 18.6% | 3163 | 47.1% | 3549 | 52.9% | |
| Dominant chronic diseases | 20,776 | 57.4% | 10,397 | 50.0% | 10,379 | 50.0% | |
| Malignancies or catastrophic condition | 636 | 1.7% | 348 | 54.7% | 288 | 45.3% | |
| Smoking status | <0.001 | ||||||
| Never smoker | 12,464 | 34.4% | 5735 | 46.0% | 6729 | 54.0% | |
| Former smoker | 7354 | 20.3% | 3260 | 44.3% | 4094 | 55.7% | |
| Current smoker | 6121 | 16.9% | 3536 | 57.8% | 2585 | 42.2% | |
| Unknown | 10,269 | 28.4% | |||||
| Alcohol consumption | <0.001 | ||||||
| Non-drinker | 14,661 | 40.5% | 7103 | 48.4% | 7558 | 51.6% | |
| Low-risk drinker | 8402 | 23.2% | 3866 | 46.0% | 4536 | 54.0% | |
| High-risk drinker | 656 | 1.8% | 365 | 55.6% | 291 | 44.4% | |
| Unknown | 12,489 | 34.5% | |||||
| Body mass index (kg/m2) | <0.001 | ||||||
| < 25 | 5187 | 14.3% | 2466 | 47.5% | 2721 | 52.5% | |
| 25–29.9 | 8217 | 22.7% | 3737 | 45.5% | 4480 | 54.5% | |
| ≧30 | 6330 | 17.5% | 3068 | 48.5% | 3262 | 51.5% | |
| Unknown | 16,474 | 45.5% | |||||
| Study groupa | <0.001 | ||||||
| Control | 17,072 | 47.1% | 9041 | 53.0% | 8031 | 47% | |
| Intervention | 19,136 | 52.9% | 9763 | 51.0% | 9373 | 49% | |
| Total | 36,208 | 100% | 18,804 | 52% | 17,404 | 48% | |
SD standard deviation, CRG Clinical Risk Group
aStudy group of the Colo-alert cluster randomised controlled trial