Control | Photo group | Unadjusted odds ratio, b, hazard ratio | 95 % confidence interval; P | Adjusted odds ratio, b, hazard ratioa | 95 % confidence interval; P | |
---|---|---|---|---|---|---|
Primary analysisb | ||||||
Completed questionnaire | 118/125 (94) | 118/126 (94) | 0.88 | 0.31 to 2.49; 0.80 | 0.84 | 0.26 to 2.66; 0.76 |
Sensitivity analysis | ||||||
Only those actually sent the questionnaire: Number of reminders = 0 | 116/123 (94) | 114/122 (93) | 0.86 | 0.30 to 2.45; 0.78 | 0.84 | 0.26 to 2.65; 0.76 |
Secondary analysisc | ||||||
Number of reminders = 0 | 68/125 (54) | 64/126 (51) | ||||
Number of reminders = 1 | 25/125 (20) | 27/126 (21) | ||||
Number of reminders = 2 | 15/125 (12) | 15/126 (12) | ||||
Number of reminders = 3 | 9/125 (7) | 6/126 (5) | ||||
Number of reminders = 4 | 4/125 (3) | 5/126 (4) | ||||
Number of reminders = 5 | 4/125 (3) | 9/126 (7) | 0.17 | −0.19 to 0.52; 0.36 | 0.22 | −0.13 to 0.56; 0.22 |
Sensitivity analysisc | ||||||
Only those actually sent the questionnaire: number of reminders = 0 | 66/123 (54) | 60/122 (49) | ||||
Number of reminders = 1 | 25/123 (20) | 27/122 (22) | ||||
Number of reminders = 2 | 15/123 (12) | 15/122 (12) | ||||
Number of reminders = 3 | 9/123 (7) | 6/122 (5) | ||||
Number of reminders = 4 | 4/123 (3) | 5/122 (4) | ||||
Number of reminders = 5 | 4/123 (3) | 9/122 (7) | 0.19 | −0.17 to 0.55; 0.31 | 0.23 | −0.12 to 0.57; 0.20 |
Secondary analysisd | ||||||
Time to complete questionnaire, median days | 7.0 | 9.0 | 0.93 | 0.72 to 1.20; 0.57 | 0.85 | 0.66 to 1.11; 0.25 |
Sensitivity analysisd | ||||||
Only those actually sent the questionnaire: time to complete questionnaire, median days | 7.5 | 10.0 | 0.91 | 0.70 to 1.18; 0.49 | 0.86 | 0.66 to 1.12; 0.27 |