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Table 2 Sensitivity, specificity, and power to predict 9 PTSD cases at month one using the ASD symptomatology

From: Routine versus ad hoc screening for acute stress following injury: who would benefit and what are the opportunities for prevention

DSM-IV ASD criteria Sensitivity Specificity PPV NPV
ASD symptoms using routine screening     
  B. Dissociation 0.78 0.43 0.31 0.86
  C. Re-experiencing/Intrusion 0.78 0.67 0.44 0.90
  D. Avoidance 0.78 0.48 0.33 0.87
  E. Anxiety/Hyperarousal 0.93 0.19 0.28 0.89
  F. Impairment 0.86 0.17 0.26 0.78
Subsyndromal ASD using routine screening     
  C + D + E 0.64 0.71 0.43 0.86
ASD diagnosis using routine screening     
  B + C + D + E + F + 2 day 0.43 0.83 0.46 0.81
Ad hoc referral practice     
  Consultation with psychiatry 0.14 0.95 0.50 0.77
  1. PPV: positive predictive value; NPV: negative predictive value.
  2. The accuracy of PTSD classification characterized by ad hoc referral with psychiatry was measured in reference to the participants SASRQ response score.