Table 5.
Factor structure of the SF-12v2 derived from principal component analysis*
| Factor 1 | Factor 2 | |
|---|---|---|
| Physical functioning (PF) | ||
| Limitations in moderate physical activities (PF1) | 0.84 | 0.31 |
| Limitations in climbing several flights of stairs (PF2) | 0.85 | 0.34 |
| Role physical (RP) | ||
| Accomplished less due to physical health (RP1) | 0.79 | 0.51 |
| Limited in kind of work or activities due to physical health (RP2) | 0. 83 | 0.50 |
| Bodily pain (BP) | ||
| Pain interference with work inside or outside home (BP)** | 0.75 | 0.56 |
| General health (GH) | ||
| Health rating in general (GH1) | 0.65 | 0.55 |
| Social functioning (SF) | ||
| Interference of physical health or emotional problems with social activities (SF1) | 0.27 | 0.65 |
| Role emotional (RE) | ||
| Accomplished less due to emotional problems (RE) | 0.49 | 0.78 |
| Not careful in work or activities due to emotional problems (RE) | 0.48 | 0.78 |
| Vitality (VT) | ||
| Having a lot of energy (VT1) | 0.50 | 0.61 |
| Mental health (MH) | ||
| Feel calm and peaceful (MH1) | 0.29 | 0.71 |
| Feel downhearted and blue (MH2) | 0.27 | 0.74 |
| Eigenvalues | 5.80 | 1.37 |
| Variance explained (%) | 48.4 | 11.5 |
* Values equal or greater than 0.4 were considered satisfactory