Table A3.
The internal consistency for each of the eight SF-36 scales (Cronbach’s alpha).
| Item-Test Correlation | Item-Rest Correlation | Average Interitem Correlation | Alpha | |
|---|---|---|---|---|
| Physical function | 0.4532 | 0.2948 | 0.4859 | 0.8687 |
| Role limitations due to physical problems | 0.7371 | 0.6373 | 0.4100 | 0.8295 |
| Bodily pain | 0.5622 | 0.4212 | 0.4567 | 0.8548 |
| General health perceptions | 0.7559 | 0.6616 | 0.4050 | 0.8265 |
| Vitality | 0.7859 | 0.7009 | 0.3970 | 0.8217 |
| Social functioning | 0.7659 | 0.6747 | 0.4023 | 0.8249 |
| Role limitations due to emotional problems | 0.7668 | 0.6758 | 0.4021 | 0.8248 |
| Mental health | 0.7850 | 0.6997 | 0.3972 | 0.8218 |
| Test scale | 0.8526 |