Table 4 Predicted probability and 95% confidence intervals (CI) of receiving a completed survey
Sample size (n) | Probability of completing survey and 95% CIs (%) | Follow-up waves | Survey length | Survey incentive |
|---|---|---|---|---|
207 | 21.7 (16.6–27.9) | 3 | Short | $2 |
210 | 20.5 (15.6–26.5) | 3 | Medium | $2 |
1041 | 16.3 (14.2–18.7) | 3 | Long | $2 |
805 | 12.0 (10.0–14.5) | 2 | Long | $2 |
219 | 8.2 (5.2–12.7) | 0 | Long | $2 |
1094 | 3.1 (2.2–4.3) | 0 | Long | Gift card |
Total = 3576 |  |  |  |  |