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Table 3 Sensitivity, specificity, and power to predict 10 PTSD cases at month four 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 0.75 0.39 0.32 0.80
  C. Re-experiencing/Intrusion 0.50 0.58 0.32 0.75
  D. Avoidance 0.58 0.55 0.33 0.77
  E. Anxiety/Hyperarousal 0.92 0.13 0.29 0.80
  F. Impairment 0.83 0.13 0.27 0.67
Subsyndromal ASD using routine screening     
  C + D + E 0.33 0.68 0.29 0.72
ASD diagnosis using routine screening     
  B + C + D + E + F + 2 day 0.17 0.81 0.25 0.71
Ad hoc referral practice     
  Consultation with psychiatry 0.17 0.97 0.67 0.75
  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.