Performance of the two PECARN TBI age-based rules independently and combined
| Age group | Sensitivity n/N (%; 95% CI) | Specificity n/N (%; 95% CI) | Negative predictive value n/N (%; 95% CI) | Positive predictive value n/N (%; 95% CI) |
|---|---|---|---|---|
| <2 years | 6/6 (100; 64.3 to 100) | 410/950 (43.2; 40.0 to 46.3) | 546/546 (100; 99.4 to 100) | 6/410 (1.7; 0.6 to 3.2) |
| ≥2 years | 13/13 (100;79.4 to 100) | 705/1459 (48.3; 45.8 to 50.9) | 1313/1313 (100; 99.8 to 100) | 13/705 (2.0; 1.1 to 3.2) |
| Overall | 19/19 (100;83.2 to 100) | 131/2409 (55; 52.5 to 56.6) | 1313/1313 (100; 99.6 to 100) | 19/1115 (1.8; 1.1 to 2.7) |
PECARN, Pediatric Emergency Care Applied Research Network; TBI, traumatic brain injury.