Table 4 Descriptive analysis of the SF-36 dimension scores
Domains | Nr items | Min value | Max value | Floor effect (%) | Ceiling effect (%) | Mean | SD | p25 | p50 (median) | p75 | Skewness | Kurtosis | Cronbach’s α |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Physical functioning | 10 | 10 | 30 | 0.7 | 31.8 | 26.53 | 4.15 | 24 | 28 | 30 | − 1.457 | 1.931 | 0.90 |
Role physical | 4 | 4 | 20 | 2.0 | 30.8 | 15.66 | 4.22 | 12 | 16 | 20 | − .714 | − .333 | 0.93 |
Bodily pain | 2 | 2 | 12 | 3.1 | 24.8 | 8.01 | 3.03 | 5.88 | 8.2 | 10.8 | − .104 | − 1.129 | 0.93 |
General health | 5 | 5 | 25 | 0.7 | 2.1 | 15.79 | 4.86 | 12 | 16 | 19.4 | − .061 | − .829 | 0.82 |
Vitality | 4 | 4 | 20 | 0.0 | 1.7 | 12.94 | 3.25 | 11 | 13 | 15 | − .254 | − 496 | 0.82 |
Social functioning | 2 | 2 | 10 | 1.0 | 32.9 | 7.91 | 2.00 | 6 | 8 | 10 | − .640 | − .519 | 0.82 |
Role emotional | 3 | 3 | 15 | 1.4 | 41.0 | 12.32 | 3.01 | 10 | 13 | 15 | − .966 | .147 | 0.92 |
Mental health | 5 | 5 | 25 | 0.0 | 3.1 | 18.23 | 4.18 | 16 | 19 | 21 | − .597 | − .363 | 0.87 |