Table 4 |
||||
|
Multinomial diagnostic regression function: 'moderate to severe OA' |
||||
|
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%) |
|
|
||||
|
* odds ratio with 95% confidence interval, adjusted for all other covariates in model. aOR is interpreted as the odds relative to the ISO-PF group (for example, compared with those people with ISO-PF, those with ISO-TF have 4.5 times the odds of intercondylar gap > 0 cm (varus deformity); compared with ISO-PF participants with NONE/MILD, ISO-TF, and COMB were less likely to report pain on patellofemoral joint compression). †Compression or glide pain. ‡Mild/Moderate/Gross. §Possible/Definite. ¶< 141mmHg |
||||
|
Peat et al. Arthritis Research & Therapy 2012 14:R63 doi:10.1186/ar3779 |
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