From: Investigating the missing data mechanism in quality of life outcomes: a comparison of approaches
 |  | Immediate responders | Reminder responders | Non-responders |
---|---|---|---|---|
 |  | Mean (SD) | Mean (SD) | Mean (SD) |
REFLUX | EQ5D | 0.75 (0.21) | 0.70 (0.25) | 0.70 (0.23) |
(3 m) | Physical summary | 45.2 (9.5) | 44.9 (9.5) | 45.5 (9.0) |
 | Mental Summary | 47.3 (11.2) | 44.5 (11.3) | 42.1 (14.7) |
 | RQLS | 66.8 (25.0) | 64.3 (24.0) | 64.0 (24.2) |
MAVIS | EQ5D | 0.77 (0.21) | 0.73 (0.23) | 0.70 (0.23) |
(6 M) | Physical summary | 43.6 (11.0) | 40.9 (10.4) | 40.0 (11.0) |
 | Mental Summary | 53.9 (8.6) | 51.7 (9.9) | 52.2 (9.1) |
RECORD | EQ5D | 0.74 (0.23) | 0.69 (0.25) | 0.66 (0.29) |
(12 m) | Physical summary | 41.7 (10.7) | 40.0 (11.1) | 38.6 (11.8) |
 | Mental Summary | 51.7 (9.9) | 48.8 (10.3) | 47.3 (11.4) |
KAT | EQ5D | 0.39 (0.31) | 0.34 (0.31) | 0.35 (0.32) |
(3 m) | Physical summary | 31.1 (8.2) | 30.0 (8.7) | 31.5 (8.3) |
 | Mental Summary | 50.1 (11.4) | 50.2 (11.8) | 47.1 (12.0) |
 | Oxford Knee Score | 18.2 (7.5) | 17.0 (7.6) | 17.5 (8.2) |
PRISM | EQ5D | 0.59 (0.30) | 0.63 (0.27) | 0.43 (0.34) |
(12 m) | Physical summary | 36.5 (11.4) | 37.4 (10.9) | 33.2 (10.0) |
 | Mental Summary | 48.9 (11.8) | 48.0 (11.8) | 46.8 (12.1) |
 | Arthritis Index | 36.1 (12.7) | 36.1 (12.6) | 31.9 (11.0) |