Table 2 Model fit statistics for WHO-5 and PWB-6
From: The assessment of psychological well-being in systemic sclerosis: a clinimetric validation
Action | Analysis | Model fit (overall) | Item fit residual, mean (SD) | Person fit residual, mean (SD) | PSI | Unidimensionality, significant t-tests (CI 95%) | Local dependency (residual correlations > 0.20 above average) |
|---|---|---|---|---|---|---|---|
WHO-5 | |||||||
Original sample (n = 216) | 1 | χ2(10) = 20.10, p = 0.028 | 0.36 (1.02) | -0.42 (1.11) | 0.85 | 3.70 (1.68–14.32) | None |
PWB-6 | |||||||
Original sample (n = 201) | 1 | χ2(12) = 12.93, p = 0.374 | 0.43 (0.72) | -0.36 (1.16) | 0.74 | 2.49 (-1.06-11.06) | PWB items 3 & 6 |
Subtest analysis, collapse of PWB items 3 & 6 | 2 | χ2(10) = 13.70, p = 0.187 | 0.33 (0.48) | -0.36 (1.11) | 0.73 | 1.49 (-3.06-9.06) | None |