From: Risk factors for joint replacement in knee osteoarthritis; a 15-year follow-up study
Total | Knee replacement | Unadjusted | Adjusteda | ||||
---|---|---|---|---|---|---|---|
Variable | (n = 66) | Unilateral (n = 29) | Bilateral (n = 37) | OR (95% CI) | p value | OR (95% CI) | p value |
Female, % (no.) | 68% (45) | 76% (22) | 62% (23) | 1.0 (0.9 – 1.0) | 0.24 | ||
Age (years), mean (SD) | 61.3 (10.0) | 62.9 (11.0) | 59.9 (9.0) | 0.5 (0.2 – 1.5) | 0.23 | ||
BMI, grade, mean (SD) | 2.2 (0.9) | 1.9 (0.9) | 2.5 (0.9) | 2.3 (1.2 – 4.3) | 0.009 | ||
WOMAC, mean (SD), baseline: | |||||||
- Pain | 196 (95) | 206 (91) | 189 (98) | 1.0 (1.0 – 1.0) | 0.48 | 1.0 (1.0 – 1.0) | 0.42 |
- Stiffness | 87(46) | 83 (47) | 91 (44) | 1.0 (1.0 – 1.0) | 0.44 | 1.0 (1.0 – 1.0) | 0.76 |
- Function | 692 (332) | 682 (320) | 701 (340) | 1.0 (1.0 – 1.0) | 0.82 | 1.0 (1.0 – 1.0) | 0.69 |
- Total | 976 (446) | 970 (420) | 981 (465) | 1.0 (1.0 – 1.0) | 0.92 | 1.0 (1.0 – 1.0) | 0.66 |
JSN grade, mean (SD) | 2.0 (0.9) | 1.9 (0.9) | 2.1 (0.9) | 1.3 (0.8 – 2.3) | 0.30 | 2.2 (1.0 – 4.6) | 0.05 |
Radiological sum score, mean (SD) | 5.8 (2.3) | 5.4 (2.4) | 6.1 (2.2) | 1.1 (0.9 – 1.4) | 0.26 | 1.4 (1.0 – 1.9) | 0.05 |
BML grade, mean (SD)b, c | 2.4 (1.6) | 2.5 (1.7) | 2.4 (1.5) | 1.0 (0.7 – 1.3) | 0.82 | 0.9 (0.6 – 1.3) | 0.63 |
Synovitis grade, mean (SD)b, d | 2.9 (0.9) | 2.8 (1.1) | 2.9 (0.7) | 1.2 (0.7 – 2.1) | 0.61 | 1.1 (0.6 – 2.1) | 0.78 |
Effusion grade, mean (SD)b, e | 2.7 (1.6) | 2.4 (1.7) | 3.0 (1.5) | 1.3 (0.9 – 1.8) | 0.20 | 1.2 (0.8 – 1.7) | 0.39 |