From: Investigating the missing data mechanism in quality of life outcomes: a comparison of approaches
 |  | Type of responder | ||
---|---|---|---|---|
Trial | Assessment | Immediate | Reminder | Non-responder |
REFLUX (N = 357) | 3 months | 39 | 47 | 14 |
 | 12 months | 38 | 51 | 11 |
MAVIS (N = 910) | 6 months | 91 | 4 | 5 |
 | 12 months | 81 | 11 | 8 |
RECORD (N = 5292) | 4 months | 58 | 20 | 22 |
 | 12 months | 54 | 17 | 29 |
 | 24 months | 51 | 14 | 35 |
KAT (N = 2356) | 3 months | 79 | 9 | 12 |
 | 1 year | 74 | 13 | 13 |
 | 2 years | 69 | 15 | 16 |
PRISM (N = 1324) | 1 year | 85 | 6 | 9 |
 | 2 years | 63 | 14 | 23 |