Table 2.
The effect of each predictor variable on the odds of septic arthritis over transient synovitis
| Variable | Study and odds ratio | ||||
|---|---|---|---|---|---|
| Kocher et al. [6] | Kocher et al. [5] | Luhmann et al. [8] | Caird et al. [3] | Singhal et al. [11] | |
| WB |
24.3
(p < 0.001) |
6
(p < 0.001) |
0.5 (p = 0.3) |
3.2 (p > 0.05) |
15
(p < 0.001) |
| WCC > 12 × 109 |
14.4
(p < 0.001) |
4
(p < 0.001) |
3.5
(p = 0.005) |
1.8 (p > 0.05) |
1.2 (p < 0.79) |
| Temperature > 38.5°C |
38.6
(p < 0.001) |
4
(p < 0.001) |
3.3
(p = 0.01) |
3 (p = 0.33) |
|
| ESR ≥ 40 mm/hr |
25.9
(p < 0.001) |
5
(p < 0.001) |
2.3 (p = 0.09) |
7.0
(p < 0.05) |
|
| CRP > 20 mg/L |
14.5
(p < 0.05) |
31
(p < 0.001) |
|||
In parentheses are the p values obtained by the authors when they performed logistic regression using the predictors shown. Only Kocher et al. found all four of their predictors (criteria) statistically significant; statistically significant predictors are shown in bold; WB = whole blood; WCC = white cell count; ESR = erythrocyte sedimentation rate; CRP = C-reactive protein.