Table 3.
Construct validity, given as Spearman's correlations of the five KOOS subscales and the eight SF-36 subscales in patients following primary TKR (n=68)
| KOOS subscales |
|||||
|---|---|---|---|---|---|
| Pain | Symptoms | ADL | Sports/Rec | QOL | |
| SF-36 subscales | |||||
| PF | 0.34 | 0.32 | 0.53 | 0.42 | 0.43 |
| RP | 0.36 | 0.29 | 0.45 | 0.31 | 0.30 |
| BP | 0.57 | 0.41 | 0.46 | 0.28 | 0.50 |
| GH | 0.21 | 0.16 | 0.44 | 0.23 | 0.25 |
| VT | 0.26 | 0.23 | 0.44 | 0.06 | 0.26 |
| SF | 0.45 | 0.33 | 0.52 | 0.21 | 0.32 |
| RE | 0.36 | 0.29 | 0.42 | 0.24 | 0.30 |
| MH | 0.24 | 0.29 | 0.41 | 0.19 | 0.29 |
As hypothesised, expected correlations were above 0.35 for a priori hypotheses 1–3 (as shown in bold typeface).
ADL, activities of daily living; BP, bodily pain; GH, general health; KOOS, Knee injury and Osteoarthritis Outcome Score; MH, mental health; PF, physical functioning; QOL, quality of life; RE, role-emotional; RP, role-physical; SF, social functioning; SF-36, Short Form 36; Sports/Rec, sports and recreation function; TKR, total knee replacement; VT, vitality.