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Table 4 Internal consistency: Cronbach’s alpha statistic for the IES-R and IES-6

From: Screening for posttraumatic stress disorder in ARDS survivors: validation of the Impact of Event Scale-6 (IES-6)

Follow-up visit

IES-R*

IES-6**

3 months

0.94

0.86

6 months

0.95

0.86

12 months

0.96

0.90

24 months

0.95

0.85

36 months

0.95

0.86

48 months

0.96

0.91

60 months

0.96

0.89

  1. *IES-R: Impact of Events Scale—Revised; **IES-6: Impact of Events Scale-6
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Critical Care

ISSN: 1364-8535