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Cronbach’s alpha, item-to-total correlations, and intraclass correlation coefficients (ICCs) of the Greek version of the SPADI scale
| Number of items | Item-to-total correlations | Cronbach’s a | ICC | (95 % Confidence interval) | |
|---|---|---|---|---|---|
| SPADI total | 13 | 0.572–0.833 | 0.932 | 0.929 | (0.907–0.948) |
| Pain | 5 | 0.706–0.826 | 0.905 | 0.902 | (0.868–0.929) |
| Disability | 8 | 0.495–0.786 | 0.899 | 0.899 | (0.866–0.926) |
| EQ-5D | 5 | 0.3–0.665 | 0.723 | 0.723 | (0.619–0.806) |
