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Table 2: Risk factor analysis for blunt cerebrovascular injury based on associated injuries
PPV NPV Sensitivity Specificity P Value Cervical spine fracture 0.09 0.95 0.25 0.84 .62 Basilar skull fracture 0.14 0.96 0.50 0.81 .05 Intracranial hemorrhage 0.16 0.95 0.63 0.67 .13 Maxillofacial fracture 0.09 0.9 0.67 0.31 1 Rib fracture 0.08 0.93 0.14 0.88 1 Clavicle fracture 0.14 0.94 0.14 0.94 .4 
- Note:—PPV indicates positive predictive value; NPV, negative predictive value.