Table 4.
Construct validity between the Korean New KSS and the Korean SF-36
| Korean SF-36 | Korean New KSS (preoperative form) | ||||
|---|---|---|---|---|---|
| Subscales | Score Mean ± SD |
Symptom/25 points | Satisfaction/40 points | Expectation/15 points | Activity/100 points |
| Physical function | 25.93 ± 7.37 | 0.41* (< 0.001) | 0.32* (< 0.001) | −0.22* (0.017) | 0.62* (< 0.001) |
| Role-physical | 30.85 ± 10.84 | 0.14 (0.116) | 0.23* (0.012) | −0.11 (0.208) | 0.46* (< 0.001) |
| Bodily pain | 33.84 ± 10.43 | 0.22* (0.016) | 0.33* (< 0.001) | −0.11 (0.225) | 0.26* (0.003) |
| General health | 40.64 ± 8.41 | −0.04 (0.629) | 0.12 (0.201) | 0.21* (0.017) | 0.05 (0.625) |
| Vitality | 43.51 ± 10.07 | 0.11 (0.218) | 0.23* (0.012) | −0.01 (0.876) | 0.15 (0.107) |
| Social function | 40.25 ± 13.08 | 0.20* (0.025) | 0.28* (0.002) | −0.04 (0.631) | 0.31* (0.001) |
| Role-emotion | 35.52 ± 16.06 | 0.09 (0.323) | 0.21* (0.022) | 0.06 (0.545) | 0.18 (0.052) |
| Mental health | 44.70 ± 10.16 | 0.09 (0.299) | 0.21* (0.022) | −0.03 (0.782) | 0.06 (0.491) |
| Physical component summary | 29.41 ± 7.77 | 0.26* (0.003) | 0.29* (0.001) | −0.14 (0.134) | 0.52* (< 0.001) |
| Mental component summary | 46.58 ± 12.75 | 0.08 (0.382) | 0.21* (0.022) | 0.07 (0.454) | 0.10 (0.280) |
KSS = Knee Society Score; Spearman’s correlation coefficients (r) when comparing the four KSS subscales with the Korean SF-36 (p value); *significant correlation at p < 0.05.