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

Table 3 Sensitivity, specificity, and power to predict 10 PTSD cases at month four using the ASD symptomatology

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

PPV: positive predictive value; NPV: negative predictive value.
The accuracy of PTSD classification characterized by ad hoc referral with psychiatry was measured in reference to the participants SASRQ response score.

ISSN: 1752-2897