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. Author manuscript; available in PMC: 2014 Apr 4.
Published in final edited form as: J Trauma Stress. 2011 Sep 6;24(5):557–565. doi: 10.1002/jts.20684

Table 3.

Mean PTSD Symptoms and Rate of Life-Threatening Exposures as a Function of Class Membership

Class
Resilient (n = 157)
Distressed–improving (n = 18)
Distressed–worsening (n = 3)
Variable M SD M SD M SD
Modified PCL-M 19.69 3.30 37.17 6.70 27.33 2.89
  Baseline
  6 months 19.43 3.87 33.21 12.83 34.33 6.65
  12 months 19.61 3.82 26.30 6.15 56.00 1.41
  18 months 19.12 3.28 24.64 7.02 38.09 1.28
  24 months 20.41 5.46 24.81 5.40 45.00 19.80
CIHQ
  Baseline 3.34 4.10 5.94 6.28 12.00 14.18
  6 months 2.38 3.84 2.11 4.10 13.00 10.54
  12 months 3.43 6.29 1.17 1.98 30.00 49.30
  18 months 2.76 5.15 1.30 2.06 11.33 19.63
  24 months 3.48 6.64 1.06 4.45 11.33 19.63
Cumulative 15.39 17.18 12.67 9.27 81.33 64.66

Note: PCL-M = PTSD Checklist-Military Version; CIHQ = Critical Incident History Questionnaire; Baseline = first reported exposure on active duty; Exposure = reported incidents of exposure to 14 possible life-threatening events experienced in the line of duty endorsed on the CIHQ; Cumulative = cumulative exposure to 14 possible life-threatening events as reported on the CIHQ.