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Table 3 Performance of SNC guideline in validation cohort

From: Validation of the Scandinavian guidelines for initial management of minimal, mild and moderate traumatic brain injury in adults

  CT results  
+ Total
SNC guideline CT 35 416 451
No CT 1 210 211
  Total 36 626 662
  1. Overall, a 32 % reduction in CT scanning was observed if SNC guidelines were used; 1 missed patient (low-risk mild with S100B ≤0.10 μg/L), see text for details; Prevalence of CT findings: 5 %; Sensitivity: 97 % (95 % CI, 84–100 %); Specificity: 34 % (95 % CI, 30–37 %); Negative predictive value, 100 % (95 % CI, 97–100 %); Positive predictive value, 8 % (95 % CI, 6–11 %)