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.