Table 2.
Multivariate logistic regression model for gFOBT uptake amongst 60–69-year-olds (n = 168,980).
Adequately screened at 12 weeks | Odds ratio | P value | 95% lower confidence limit | 95% upper confidence limit |
---|---|---|---|---|
Intervention group (reference = control group) |
||||
A | 0.99 | 0.680 | 0.92 | 1.05 |
B | 1.07 | 0.047 | 1.00 | 1.15 |
C | 1.09 | 0.027 | 1.01 | 1.18 |
D | 1.28 | <0.001 | 1.18 | 1.39 |
Contamination variable (reference = uncontaminated) |
||||
Contaminated-control | 1.09 | 0.006 | 1.03 | 1.17 |
Contaminated-A | 1.26 | 0.001 | 1.10 | 1.44 |
Contaminated-B | 1.29 | 0.001 | 1.11 | 1.51 |
Age at invitation (reference = 60 years) |
1.004 | 0.353 | 1.00 | 1.01 |
Previous screening status (reference = previously screened) |
||||
First-timers | 0.17 | <0.001 | 0.16 | 0.18 |
Previous nonresponders | 0.05 | <0.001 | 0.05 | 0.06 |
Interaction term: previous screening status × age at invitation | ||||
First-timers | 0.94 | <0.001 | 0.92 | 0.96 |
Previous nonresponders | 0.91 | <0.001 | 0.90 | 0.93 |
IMD score | 0.98 | <0.001 | 0.98 | 0.99 |
Gender (reference 0 = female, 1 = male) |
0.83 | <0.001 | 0.81 | 0.85 |
Date the kit was sent (days) | 0.9997 | <0.001 | 1.00 | 1.00 |
Constant | 5653.54 | <0.001 | 1369.18 | 23344.31 |