Table 2.
Multivariate multinomial regression analysis for participation in the colorectal cancer screening programme by clinical risk groups
| Unadjusted (n = 36,208) | Adjustedb (n = 33,943) | |||||||
|---|---|---|---|---|---|---|---|---|
| IRR | IC95% | p | IRR | IC95% | p | |||
| CRG status | ||||||||
| Healthya | 1 | - | - | - | 1 | - | - | - |
| Acute disease | 1.03 | 0.70 | 1.52 | 0.879 | 0.73 | 0.49 | 1.11 | 0.142 |
| Minor chronic disease | 1.25 | 1.18 | 1.32 | <0.001 | 1.05 | 0.99 | 1.12 | 0.119 |
| Multiple minor chronic diseases | 1.49 | 1.40 | 1.58 | <0.001 | 1.14 | 1.06 | 1.22 | <0.001 |
| Single dominant chronic idisease | 1.25 | 1.19 | 1.31 | <0.001 | 0.98 | 0.93 | 1.04 | 0.509 |
| Two dominant chronic disease | 1.29 | 1.24 | 1.35 | <0.001 | 0.95 | 0.90 | 1.01 | 0.087 |
| Three or more dominant chronic disease | 1.02 | 0.88 | 1.19 | 0.782 | 0.76 | 0.65 | 0.89 | 0.001 |
| Malignancies | 1.17 | 1.01 | 1.35 | 0.039 | 0.87 | 0.74 | 1.01 | 0.067 |
| Catastrophic condition | 1.11 | 0.91 | 1.36 | 0.286 | 0.90 | 0.74 | 1.10 | 0.310 |
| Collapsed CRG | ||||||||
| Healthy or acute diseasea | 1 | - | - | - | 1 | - | - | - |
| Minor chronic diseases | 1.34 | 1.28 | 1.41 | <0.001 | 1.09 | 1.03 | 1.15 | 0.002 |
| Dominant chronic diseases | 1.27 | 1.22 | 1.32 | <0.001 | 0.97 | 0.92 | 1.02 | 0.186 |
| Malignancies or catastrophic condition | 1.15 | 1.02 | 1.30 | 0.025 | 0.88 | 0.78 | 1.00 | 0.055 |
Statistically significant differences are showed in bold (p < 0.05).
FIT Faecal immunochemical test, IRR Incidence Rate Ratio, CRG Clinical Risk Group
aReference category
bAdjusted by sex, age, socioeconomic deprivation index, number of visits, study group of the Colo-alert cluster randomised controlled trial