Table 2.

Item level values and item-total correlation of PCL-C

Item	Corrected item-total correlation	Alpha if Item deleted
1. Memories/thoughts/images	0.66	0.90
2. Repeated, disturbing dreams	0.62	0.90
3. Acting/feeling as if happening again	0.67	0.90
4. Feeling upset at reminders	0.77	0.89
5. Physical reactions at reminders	0.67	0.90
6. Avoid thinking/talking/feelings	0.72	0.89
7. Avoid activities/situations	0.73	0.89
8. Trouble remember details	0.59	0.90
9. Loss of interest in activities	0.60	0.90
10. Feeling distant or cut off from others	0.63	0.90
11. Feeling emotionally numb	0.56	0.90
12. Feeling as if future cut short	0.61	0.90
13. Trouble sleeping	0.51	0.90
14. Irritability/angry outbursts	0.66	0.90
15. Difficulty concentrating	0.61	0.90
16. Super alert or watchful	0.41	0.90
17. Jumpy or easily started	0.63	0.90
Sum score	N/A	0.90a

^aOverall Cronbach’s alpha based on sum score; PCL-C Posttraumatic Stress Disorders Checklist Civilian Version