Sensitivity and specificity of the original 7-item CATCH rule for children with minor head injury
| Variable | No. of patients* | |
|---|---|---|
| Neurosurgical intervention | ||
| Result of rule assessment | Yes | No |
| Positive | 21 | 1733 |
| Negative | 2 | 2304 |
| Sensitivity, % (95% CI) | 91.3 (72.0–98.9) | |
| Specificity, % (95% CI) | 57.1 (55.5–58.6) | |
| Brain injury on CT | ||
| Result of rule assessment | Yes | No |
| Positive | 192 | 1562 |
| Negative | 5 | 2301 |
| Sensitivity, % (95% CI) | 97.5 (94.2–99.2) | |
| Specificity, % (95% CI) | 59.6 (58.0–61.1) | |
Note: CATCH = Canadian Assessment of Tomography for Childhood Head injury,
CI = confidence interval, CT = computed tomography.
↵* Unless stated otherwise.