Factor loadings expected in the SF-36 measurement model and the actual loadings obtained (n=1688)
| Hypothesised association† | Factorial analysis: Rotated principal components | Relative validity‡ | |||||
|---|---|---|---|---|---|---|---|
| Correlations with: | |||||||
| Scale | Physical | Mental | Physical | Mental | Variance explained | Physical | Mental |
| †+ strong association (r≥0.70); *moderate association (0.30<r<0.70); – weak association (r≤0.30). ‡The ratio of explained variance of a given scale in principal component to that of the best scale. | |||||||
| PF | + | – | 0.59 | 0.25 | 0.42 | 0.49 | 0.09 |
| RP | + | – | 0.84 | 0.07 | 0.70 | 1.00 | 0.01 |
| BP | + | – | 0.48 | 0.45 | 0.43 | 0.33 | 0.29 |
| GH | * | * | 0.35 | 0.68 | 0.59 | 0.17 | 0.67 |
| VT | * | * | 0.16 | 0.83 | 0.72 | 0.04 | 1.00 |
| SF | * | + | 0.52 | 0.42 | 0.45 | 0.38 | 0.26 |
| RE | – | + | 0.74 | 0.11 | 0.56 | 0.78 | 0.02 |
| MH | – | + | 0.06 | 0.79 | 0.63 | 0.00 | 0.90 |