Sensitivity and specificity of the 8-item CATCH2 rule for children with minor head injury
| Variable | No. of patients* | |
|---|---|---|
| Neurosurgical intervention | ||
| Result of rule assessment | Yes | No |
| Positive | 23 | 2191 |
| Negative | 0 | 1846 |
| Sensitivity, % (95% CI) | 100 (85.2–100) | |
| Specificity, % (95% CI) | 45.7 (44.2–47.3) | |
| Brain injury on CT | ||
| Result of rule assessment | Yes | No |
| Positive | 196 | 2018 |
| Negative | 1 | 1845 |
| Sensitivity, % (95% CI) | 99.5 (97.2–100) | |
| Specificity, % (95% CI) | 47.8 (46.8–49.4) | |
Note: CATCH = Canadian Assessment of Tomography for Childhood Head injury, CI = confidence interval, CT = computed tomography.
↵* Unless stated otherwise.