Table 2.
MID estimates of the WHODAS, SDS, and SOFAS.
| Variables | WHODAS | SDS | SOFAS |
|---|---|---|---|
| No. of items | 12.0 | 3.0 | 1.0 |
| Observed range | 0–40 | 0–30 | 25–85 |
| Mean | 15.2 | 14.7 | 57.8 |
| SD | 8.0 | 6.9 | 11.9 |
| Reliability | 0.9 | 0.8 | N/A |
| Type of MID | |||
| 1 SEM | 3.3 | 3.1 | 11.9 |
| 2 SEM | 6.5 | 6.3 | 23.9 |
| 0.2 SD | 1.8 | 1.4 | 2.4 |
| 0.35 SD | 3.1 | 2.4 | 4.2 |
| 0.5 SD | 4.5 | 3.5 | 6.0 |
| Improved vs stable | 2.2 | 4.1 | 5.9 |
| Improved vs non-improved | 6.8 | 6.7 | 7.8 |
| Summary statistic of MID | |||
| Range | 1.8–6.8 | 1.4–6.7 | 2.39–23.88 |
| Range, excluding high and low | 2.64–5.51 | 2.76–5.11 | 5.04–9.86 |
| Mean | 4.0 | 3.9 | 8.9 |
| Median | 3.3 | 3.5 | 6.0 |
| Best estimate | 3 . 00 | 4 . 00 | 6 . 00 |
Bold values indicate the best estimate of MID.