Table 5 Predicted probability and 95% confidence intervals (CI) of a recipient participating in the field study
Follow-up waves | Survey length | Field study participation amount | Sample size (n) | Probability of participating in field study (% with 95% CIs)a | Probability of participating among survey respondents (% with 95% CIs)b |
|---|---|---|---|---|---|
3 | Short | $150 | 207 | 2.9 (1.3–6.3) | 13.3 (6.1–26.7) |
3 | Medium | $150 | 210 | 2.4 (1.0–5.6) | 11.6 (4.9–25.1) |
3 | Long | $150 | 427 | 2.1 (1.1–4.0) | 12.5 (6.6–22.3) |
2 | Long | $200 | 805 | 1.0 (0.5–2.0) | 8.2 (4.2–15.6) |
3 | Long | $200 | 614 | 0.8 (0.3–1.9) | 5.1 (2.1–11.7) |
0 | Long | $200 | 219 | 0.5 (0.1–3.2) | 5.6 (0.8–30.7) |
|  |  |  | Total = 2482 |  |  |