From: Clinical features of symptomatic patellofemoral joint osteoarthritis
N | 688 | |||
---|---|---|---|---|
Missing | 57 | |||
 | NONE/MILD | ISO-PF | ISO-TF | COMB |
 | n = 415 | n = 91 | n = 114 | n = 68 |
 | aOR (95% CI)* |  | aOR (95% CI)* | aOR (95% CI)* |
Age (per year) | 0.91 (0.88, 0.95) | 1 | 0.99 (0.95, 1.03) | 1.00 (0.96, 1.05) |
Female gender | 1.20 (0.66, 2.18) | 1 | 1.18 (0.58, 2.39) | 1.09 (0.49, 2.44) |
BMI (per kg/m2) | 0.94 (0.87, 1.00) | 1 | 1.02 (0.95, 1.09) | 1.04 (0.97, 1.12) |
Dramatic swelling ever | 0.36 (0.19, 0.69) | 1 | 0.35 (0.16, 0.76) | 0.95 (0.44, 2.07) |
Difficulty descending stairs | 0.60 (0.35, 1.05) | 1 | 1.36 (0.70, 2.66) | 1.41 (0.65, 3.07) |
Intercondylar gap > 0 cm | 1.53 (0.67, 3.51) | 1 | 4.50 (1.87, 10.84) | 1.62 (0.56, 4.68) |
PFJ compression test†| 0.52 (0.29, 0.92) | 1 | 0.40 (0.20, 0.79) | 0.22 (0.10, 0.48) |
Knee effusion‡ | 0.42 (0.25, 0.72) | 1 | 1.21 (0.66, 2.25) | 1.29 (0.63, 2.63) |
Fixed flexion deformity | 0.83 (0.31, 2.24) | 1 | 2.68 (1.01, 7.08) | 4.56 (1.67, 12.49) |
Bony enlargement§ | 1.13 (0.66, 1.95) | 1 | 1.75 (0.92, 3.32) | 2.59 (1.21, 5.53) |
Reduced knee extensor strength¶ | 0.38 (0.20, 0.69) | 1 | 0.41 (0.20, 0.83) | 0.68 (0.30, 1.56) |
Coarse crepitus§ | 0.37 (0.22, 0.63) | 1 | 0.75 (0.40, 1.38) | 0.82 (0.40, 1.69) |
Knee flexion ROM (per degree) | 0.99 (0.96, 1.02) | 1 | 0.96 (0.93, 0.99) | 0.95 (0.92, 0.98) |
Nagelkerke's Pseudo R2 | 0.47 | |||
Pearson goodness-of-fit | P = 1.00 | |||
Pre-test probability | 0.60 | 0.14 | 0.16 | 0.10 |
Correctly classified on 'confident diagnosis' (probability ≥0.8) | 222 (53%) | 0 | 0 | 0 |
Correctly classified on 'balance of probabilities' | 385 (93%) | 23 (25%) | 41 (36%) | 18 (26%) |