Table 2 Response rates between incentive payment groups
Up-front payment group | Delayed payment group | Chi-square test | |
|---|---|---|---|
Patients contacted (n) | 600 | 623 | |
Patients who refused to join the study n (%) | 240 (40 %) | 263 (42 %) | p = 0.433 |
Patients who agreed to join the study n (%) | 360 (60 %) | 360 (58 %) | |
Baseline interview n (%) | |||
Successfully interviewed | 259 (71.9 %) | 260 (72.2 %) | p = 0.938 |
Failed to contact | 101 (28.1 %) | 100 (27.8 %) | |
12-Month follow-up interview n (%) | |||
Successfully interviewed | 201 (77.6 %) | 205 (78.8 %) | p = 0.751 |
Failed to contact | 58 (22.4 %) | 55 (21.2 %) | |