Table of mean scores (SD) of the eight SF-36 subscales in the study respondents compared with National Health Survey
| SF-36 subscale | Study respondents (n=1784): mean (SD) | NHS (n=15938)29 mean (SD) | Effect size (SD units)* | p Value† |
|---|---|---|---|---|
| *Effect size = difference in means divided by the NHS standard deviation. †From one sample t test using the NHS mean as the test value. | ||||
| Physical functioning | 87.3 (19.3) | 87.4 (19.7) | 0.01 | 0.827 |
| Role limitations—physical | 80.9 (32.9) | 84.5 (31.9) | 0.11 | <0.001 |
| Bodily pain | 77.7 (24.5) | 79.1 (23.6) | 0.06 | 0.016 |
| General health perceptions | 74.0 (20.0) | 73.8 (19.2) | 0.01 | 0.673 |
| Vitality/energy | 64.6 (19.7) | 65.6 (19.0) | 0.05 | 0.032 |
| Social functioning | 83.1 (22.7) | 86.0 (21.3) | 0.14 | <0.001 |
| Role limitations—emotional | 82.2 (30.9) | 84.6 (31.0) | 0.08 | 0.001 |
| Mental health | 77.0 (16.9) | 75.7 (16.7) | 0.08 | 0.001 |