Table 4 Scores computed using standard rules and/or after imputation of the missing values
Non responders | Partial responders | All | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Complete and consistent | Absent at the 2-month visit | Incapable of responding | Not willing to fill-in | > 2 missing physical and role items | > 2 missing mental items (a) | > 2 missing physical and role items and > 2 missing mental items | Complete questionnaires with > 2 inconsistancies | Other (slightly) incomplete and inconsistent questionnaire | ||||
Mean score | Bias 1 | Bias 1 | Bias 1 | Bias 2 | Bias 2 | Bias 2 | Bias 2 | Bias 2 | Mean (SD) score (using standard scoring rules) | Mean (SD) score (after imputation) | Bias 2 | |
A | ||||||||||||
<60 yrs. | 92.01 | -2.78 | -11.93 | -3.92 | 3.75 | 0.00 | 6.62 | -8.86 | -0.91 | 91.06 (15.96) | 90.18 (16.86) | -0.88 |
60 - 64 yrs | 82.28 | -6.08 | -12.97 | -8.59 | 2.89 | 0.00 | 3.40 | -11.97 | -0.83 | 80.90 (21.97) | 79.01 (21.27) | -1.88 |
65 - 69 yrs. | 77.03 | -7.58 | -13.78 | -8.26 | -1.91 | 0.00 | 5.57 | -24.46 | -1.06 | 75.63 (23.11) | 73.10 (22.00) | -2.52 |
70 - 74 yrs. | 69.69 | -3.42 | -12.59 | -5.09 | 0.48 | 0.00 | 7.56 | -7.20 | -1.36 | 68.26 (26.25) | 66.93 (23.64) | -1.33 |
75 - 79 yrs | 64.21 | -3.26 | -10.14 | -5.73 | 0.79 | 0.00 | 5.93 | 9.72 | -0.60 | 61.66 (27.73) | 60.78 (24.19) | -0.88 |
80 - 84 yrs | 52.74 | 1.10 | -4.48 | 0.12 | -0.54 | 0.00 | 7.49 | 3.32 | -0.66 | 51.18 (29.74) | 52.11 (24.97) | 0.93 |
≥85 yrs. | 37.91 | 9.03 | -0.65 | 7.91 | -9.15 | 0.00 | 7.13 | 0.00 | 0.68 | 40.74 (31.87) | 43.65 (25.69) | 2.91 |
B | ||||||||||||
<60 yrs. | 67.60 | 3.70 | -8.30 | 1.59 | 0.00 | -0.26 | 0.15 | 0.00 | 0.00 | 67.64 (19.99) | 68.26 (20.01) | 0.62 |
60 - 64 yrs | 61.32 | 2.65 | -8.03 | -2.17 | 0.00 | 0.34 | -1.29 | 0.00 | -0.01 | 60.68 (20.90) | 60.81 (20.97) | 0.13 |
65 - 69 yrs. | 56.79 | 2.03 | -9.06 | 0.34 | 0.00 | -0.67 | -1.01 | 0.00 | 0.01 | 56.60 (21.54) | 56.82 (21.39) | 0.23 |
70 - 74 yrs. | 54.37 | 3.19 | -8.21 | 0.23 | 0.00 | 0.00 | -0.59 | 0.00 | -0.17 | 53.49 (22.08) | 54.10 (21.84) | 0.61 |
75 - 79 yrs | 52.35 | 3.18 | -7.97 | -0.88 | 0.00 | -0.77 | 0.34 | 0.00 | -0.1 | 51.73 (22.01) | 52.14 (21.69) | 0.41 |
80 - 84 yrs | 48.07 | 3.45 | -2.76 | -0.04 | 0.00 | 0.00 | -0.34 | 0.00 | -0.13 | 46.62 (23.56) | 47.71 (22.78) | 1.09 |
≥85 yrs. | 44.94 | 4.25 | -7.78 | 1.71 | 0.00 | 0.00 | -1.17 | 0.00 | -0.39 | 47.94 (24.20) | 47.28 (22.84) | -0.67 |