Table 3 Ordinal factor analysis
WOMAC subscale | Eigenvalues (%variance) | MAP: number of dimensions | N | ||
|---|---|---|---|---|---|
| Â | Factor 1 | Factor 2 | Factor 3 | Â | Â |
Physical | 12.11 (71.3) | 1.27 (7.4) | 0.78 (4.6) | 1 | 675 |
Pain-knee | 4.05 (81.1) | 0.44 (8.9) | 0.28 (5.9) | 1 | 557 |
Pain-hip | 4.39 (87.7) | 0.27 (5.4) | 0.22 (4.4) | 1 | 449 |
Impair (stiff + pain)-knee | 5.40 (77.2) | 0.51 (7.3) | 0.42 (6.0) | 1 | 553 |
Impair (stiff + pain)-hip | 5.86 (83.7) | 0.44 (6.2) | 0.30 (4.3) | 1 | 437 |
All items-knee | 15.96 (66.4) | 1.82 (7.6) | 1.13 (4.7) | 1 | 517 |
All items-hip | 14.77 (61.5) | 3.01 (12.5) | 1.08 (4.5) | 2 | 403 |