TABLE 5.

Diagnostic Test Characteristics of Having a History of No or Low-Impact Trauma for Identifying Cases of Definite Abuse*

Patient GroupSensitivity (95% CI)Specificity (95% CI)PPV (95% CI)Negative Predictive Value (95% CI)
Normal neurologic status (n = 101)1 (0.78–1.0)0.59 (0.48–0.70)0.30 (0.18–0.45)1 (0.93–1.0)
Initial abnormal neurologic status (n = 60)1 (0.89–1.0)0.71 (0.51–0.87)0.80 (0.64–0.91)1 (0.83–1.0)
Persistent abnormal neurologic status (n = 33)1 (0.86–1.0)1 (0.63–1.0)1 (0.86–1.0)1 (0.63–1.0)
All cases (n = 161)1 (0.92–1.0)0.62 (0.52–0.71)0.53 (0.41–0.63)1 (0.95–1.0)
  • * Two cases of witnessed abuse with history of high-impact trauma were excluded from analysis.