Table 5.
Distribution of reason categories among stratified patient characteristics in the sample with missing cognitive testing data (n=366)
| Characteristic | Level (Range) | Reference | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Age, yr | Comorbidity (CCI) | Depression (HADS) | Educationa | ||||||||||
| Low (≤57) | Medium (57<yr<81) | High (≥81) | Low (≤4.3) | Medium (4.3<CCI<8.7) | High (≥8.7) | Low (≤1.4) | Medium (1.4<HADS<9.0) | High (≥9.0) | Low | Medium | High | ||
| N | 57 | 270 | 39 | 69 | 229 | 68 | 61 | 236 | 69 | 74 | 256 | 36 | 366 |
| Reason for missing data, % | |||||||||||||
| Visual impairment | 35 | 51 | 54 | 36 | 51 | 53 | 51 | 50 | 44 | 51 | 48 | 44 | 49 |
| Refused consent/lack of motivation | 39 | 30 | 26 | 41 | 30 | 22 | 38 | 28 | 32 | 23 | 33 | 28 | 31 |
| Motor condition | 14 | 13 | 10 | 12 | 12 | 15 | 7 | 14 | 15 | 12 | 11 | 22 | 13 |
| Did not follow instruction | 2 | 5 | 10 | 3 | 4 | 10 | 2 | 5 | 9 | 11 | 4 | 3 | 5 |
| Language difficulties | 7 | 1 | 0 | 6 | 1 | 0 | 2 | 2 | 1 | 1 | 2 | 0 | 2 |
| Technical or medical incident | 4 | 1 | 0 | 3 | 1 | 0 | 2 | 1 | 0 | 1 | 1 | 3 | 1 |
| λ (P value) | 0.01 (0.76) | 0.02 (0.68) | 0.0 | 0.0 | |||||||||
CCI, Charlson Comorbidity Index; HADS, Hospital Anxiety and Depression Scale German Version, subscale depression.
a
Education level range: low, without graduation; medium, middle school; high, high school diploma.