Table 2.
Distribution and internal consistency for the subscales of the C-WORC
| Subscale | Mean ± SD | Observed range | Theoretical range | Missing items n (%) a | Floor effect (%) b | Ceiling effect (%) b | Cronbach's Alpha |
|---|---|---|---|---|---|---|---|
| Overall scale | 37.1 ± 13.4 | 6.0 – 68.7 | 0 – 100 | 1 (0.8) | 0 | 0 | 0.950 |
| Physical symptoms | 40.2 ± 15.1 | 0 – 82.5 | 0 – 100 | 0 (0) | 1.6 | 0 | 0.938 |
| Sports/recreation | 33.2 ± 13.6 | 0 – 72.0 | 0 – 100 | 0 (0) | 0.8 | 0 | 0.911 |
| Work | 30.9 ± 15.0 | 0.5 – 67.5 | 0 – 100 | 1 (0.8) | 0 | 0 | 0.872 |
| Lifestyle | 38.1 ± 16.3 | 0 – 77.8 | 0 – 100 | 0 (0) | 1.6 | 0 | 0.954 |
| Emotions | 42.9 ± 26.6 | 2.3 – 100 | 0 – 100 | 1 (0.8) | 0 | 0.8 | 0.946 |
C-WORC Chinese version of the Western Ontario Rotator Cuff Index, SD Standard deviation
aNumber of patients with some missing items in the subscale or overall scale
bPercentage of patients with the worst (floor effect) and the best (ceiling effect) score