. Author manuscript; available in PMC: 2013 Nov 27.

Published in final edited form as: Disaster Med Public Health Prep. 2011 Sep 7;5(0 2):10.1001/dmp.2011.50. doi: 10.1001/dmp.2011.50

TABLE 2.

Proportions Meeting PTSD Symptom Criteria by Disaster Exposure Group Hierarchy

Disaster Exposure Group	Met PTSD Symptom Criteria, % (n/N)
Direct physical exposure to danger	35.3 (36/102)
Witnessed exposure only (not physically endangered)	19.5 (8/41)^*
Eyewitness to disaster only (not physically endangered)	21.1 (4/19)
Witnessed disaster aftermath only (not physically endangered, not eyewitness to the attacks)	18.2 (4/22)
Exposure through close associate (not physically endangered, not exposed via witnessing attacks or aftermath)	34.6 (9/26)^†
Any of these exposures (meeting PTSD criterion A)	31.4 (53/169)
None of these exposures (not meeting PTSD criterion A)	12.0 (25/209)

PTSD=posttraumatic stress disorder.

Compared with those physically endangered, χ²=3.42, df 1, P=.064.

^†

Compared with those physically endangered, χ²=.56, df 1, P=.454.