Table 3 Multinomial regression function: 'any OA'
From: Clinical features of symptomatic patellofemoral joint osteoarthritis
N | 666 | ||
|---|---|---|---|
Missing | 49 | ||
| Â | NONE | ISO-PF | COMB |
| Â | n = 212 | n = 170 | n = 284 |
| Â | aOR (95% CI)* | Â | aOR (95% CI)* |
Age (per year) | 0.96 (0.93, 0.99) | 1 | 1.04 (1.01, 1.07) |
Female gender | 2.87 (1.79, 4.59) | 1 | 1.56 (0.99, 2.47) |
BMI (per kg/m2) | 0.94 (0.89, 0.99) | 1 | 1.04 (0.99, 1.09) |
Whole leg pain | 2.12 (1.10, 4.08) | 1 | 0.74 (0.37, 1.50) |
Difficulty descending stairs | 0.45 (0.27, 0.73) | 1 | 1.15 (0.74, 1.80) |
Intercondylar gap > 0 cm | 1.38 (0.75, 2.57) | 1 | 2.34 (1.32, 4.14) |
Knee effusion†| 0.82 (0.49, 1.35) | 1 | 2.42 (1.55, 3.77) |
Fixed flexion deformity | 0.20 (0.04, 0.93) | 1 | 2.31 (1.13, 4.77) |
Coarse crepitus‡ | 0.64 (0.40, 1.02) | 1 | 1.57 (1.03, 2.41) |
Knee flexion ROM (per degree) | 0.99 (0.96, 1.01) | 1 | 0.96 (0.94, 0.98) |
Nagelkerke's Pseudo R2 | 0.41 | ||
Pearson goodness-of-fit | P = 0.45 | ||
Pre-test probability | 0.32 | 0.26 | 0.43 |
Correctly classified on 'balance of probabilities' | 136 (64%) | 36 (21%) | 220 (77%) |
Correctly classified on 'confident diagnosis' (probability ≥0.8) | 18 (8%) | 0 | 79 (28%) |