Performance of the clinical decision rule to identify skull fracture in young children with minor head trauma
| Result with rule | Derivation cohort | Validation cohort | ||||
|---|---|---|---|---|---|---|
| Fracture | No fracture | Total | Fracture | No fracture | Total | |
| Positive | 46 | 104 | 150 | 39 | 109 | 148 |
| Negative | 3 | 658 | 661 | 5 | 703 | 708 |
| Total | 49 | 762 | 811 | 44 | 812 | 856 |
| Sensitivity, % (95% CI) | 94 (83–99) | 89 (76–95) | ||||
| Specificity, % (95% CI) | 86 (84–89) | 87 (84–89) | ||||
| Positive predictive value, % (95% CI) | 31 (23–39) | 26 (19–34) | ||||
| Negative predictive value, % (95% CI) | 100 (99–100) | 99 (98–100) | ||||
| Positive likelihood ratio (95% CI) | 6.88 (5.67–8.34) | 6.60 (5.38–8.10) | ||||
| Negative likelihood ratio (95% CI) | 0.07 (0.02–0.21) | 0.13 (0.06–0.30) | ||||
Note: CI = confidence interval.