Table 3 Performance of the clinical decision rule ( N = 95)
Fracture present | Fracture absent | |
|---|---|---|
Fracture predicted | ||
Yes | 63 | 16 |
No | 0 | 16 |
Sensitivity | 1.00 (95% CI 0.93 to 1.00) | |
Specificity | 0.50 (95% CI 0.32 to 0.68) | |
Positive predictive value | 0.80 (95% CI 0.69 to 0.88) | |
Negative predictive value | 1.00 (95% CI 0.76 to 1.00) | |
Patients correctly identified | 83.2% | |
Radiographic rate reduction | 100% to 83.2% = 16.8% | |