Table 7 Sensitivity analyses excluding patients without mode preference
Invitation formats | No choice | Choice | ||||
|---|---|---|---|---|---|---|
TRIAL 1 | Interview (n = 198) | Interview or questionnaire (n = 113) | X 2 | df | p | RR (95%CI) |
Participation rate | 130 (66%) | 72 (64%) | 0.12 | 1 | 0.73 | 0.95 (0.69 - 1.29) |
Conditional participation rate | 130 (90%) | 72 (77%) | 7.43 | 1 | <.01 | 0.44 (0.24 - 0.81) |
Willing to participate | 145 (73%) | 94 (83%) | 4.006 | 1 | <.05 | 1.59 (1.00 - 2.55) |
No choice | Choice | |||||
TRIAL 2 | Questionnaire (n = 294) | Interview or questionnaire (n = 189) | X 2 | df | p | RR (95%CI) |
Participation rate | 134 (46%) | 110 (58%) | 7.33 | 1 | <.01 | 1.30 (1.07 - 1.59) |
Conditional participation rate | 134 (53%) | 110 (69%) | 10.63 | 1 | <.01 | 1.53 (1.17 - 1.99) |
Willing to participate | 253 (86%) | 159 (84%) | 0.34 | 1 | 0.56 | 0.88 (0.57 - 1.36) |