Table 4 Univariate and multivariate regression results for survey response (yes) in the intervention vs. control and across demographics
From: Improving postal survey response using behavioural science: a nested randomised control trial
Variable | Response (yes) | Unadjusted OR (95% CI) | p-value | Adjusted ORa (95% CI) | p-value |
|---|---|---|---|---|---|
Group Allocation | |||||
Control | 289 (21.42%) | – | 0.003 | – | 0.004 |
Intervention | 357 (26.39%) | 1.32 (1.10–1.57) | 1.30 (1.09–1.55) | ||
Age (years) | |||||
Age | – | 1.01 (1.00–1.02) | 0.047 | 1.01 (1.00–1.02) | 0.082 |
Area-level deprivation | |||||
IMD score | – | 0.99 (0.99–1.00) | 0.011 | 0.99 (0.99–1.00) | 0.017 |
NHS Site | |||||
Manchester | 513 (24.55%) | – | 0.152 | – | 0.259 |
London | 133 (21.73%) | 0.85 (0.69–1.06) | 0.88 (0.71–1.10) | ||
Test result | |||||
Test result (1) | 505 (22.93%) | – | 0.013 | – | 0.024 |
Test result (2 + 3) | 141 (28.2%) | 1.32 (1.06–1.64) | 1.29 (1.04–1.61) | ||