Table 1.
Response proportion (by day 22 and by the end of the survey, respectively) for intervention and control groups. Percent (descriptive) and OR (logistic regression)
| Treatment group | Response proportion (%) – day 22 | OR and 95% CI |
Response proportion (%) – final | OR and 95% CI |
|---|---|---|---|---|
| Overall | ||||
| Animation (intervention) | 37.7 | 0.97 (0.95–0.99)* | 55.1 | 0.99 (0.97–1.01) |
| Generic letter / no animation (control) | 38.5 | Ref | 55.4 | Ref |
| Subsample 1 | ||||
|
Intervention group 1 A: Animation targeted ethnic minorities |
17.0 | 0.98 (0.86–1.11) | 30.9 | 1.04 (0.94–1.16) |
|
Intervention group 1B: Animation targeted the general population (general video) |
15.2 | 0.85 (0.75–0.97)* | 29.0 | 0.96 (0.86–1.06) |
| Control group 1 (generic letter) | 17.4 | Ref | 30.0 | Ref |
| Subsample 2 | ||||
|
Intervention group 2 A: Animation targeted men aged 16–24 years |
21.1 |
1.13 (1.02–1.26)* |
36.0 | 1.07 (0.98–1.17) |
|
Intervention group 2B: Animation targeted the general population (general video) |
17.8 | 0.92 (0.82–1.03) | 34.0 | 0.98 (0.90–1.07) |
| Control group 2 (generic letter) | 19.1 | Ref | 34.5 | Ref |
| Subsample 3 | ||||
|
Intervention group 3 A: Animation targeted women aged 75 years or older |
52.4 | 0.94 (0.84–1.05) | 76.2 | 1.04 (0.91–1.18) |
|
Intervention group 3B: Animation targeted the general population (general video) |
50.9 | 0.89 (0.80–0.99)* | 73.8 | 0.92 (0.81–1.04) |
| Control group 3 (generic letter) | 53.9 | Ref | 75.5 | Ref |
| Subsample4 | ||||
|
Intervention group 4: Animation targeted the general population (general video) |
39.9 | 0.97 (0.95–0.99)* | 57.3 | 0.99 (0.97–1.01) |
| Control group 4 (generic letter) | 40.6 | Ref | 57.7 | Ref |