Table 5.
Cronbach's α-Coefficient for Internal Consistency for Each SF-36 Domain, Compared to a Normal Swedish Population (n = 8930)
| SF-36 domain | Cronbach's alpha (Normal Population) | Power |
|---|---|---|
| PF | 0.91 (0.91) | 0.92 |
| RP | 0.89 (0.88) | 0.65 |
| BP | 0.86 (0.93) | 0.90 |
| GH | 0.77 (0.84) | 0.86 |
| VT | 0.86 (0.85) | 0.87 |
| SF | 0.84 (0.85) | 0.99 |
| RE | 0.92 (0.79) | 0.69 |
| MH | 0.83 (0.87) | 1.00 |
| PCS | n/a | 1.00 |
| MCS | n/a | 1.00 |
Statistical power for each SF-36 domain and summary score was used to detect a 10% difference from the reference group median score. PF indicates physical functioning; RP, role physical; BP, bodily pain; GH, general health; VT, vitality; SF, social functioning; RE, role emotional; MH, mental health; PCS, physical component summary; MCS, mental component summary.