Posttraumatic stress disorder following traumatic injury at 6 months: associations with alcohol use and depression.

BACKGROUND: Posttraumatic stress disorder (PTSD) is progressively recognized as a psychological morbidity in injured patients. Participants in a longitudinal study were identified as PTSD positive or PTSD negative at 6 months following injury. Risky alcohol use, depression, demographic, and injury-related variables were explored.

METHODS: This prospective cohort included patients 18 years or older, admitted to our Level I trauma center. Outcome measures included PTSD Checklist-Civilian Version (PCL-C), Alcohol Use Disorders Identification Test (AUDIT-C), and Patient Health Questionnaire (PHQ-8). Demographic and injury variables were collected.

RESULTS: A total of 211 participants enrolled in the study, and 118 participants completed measures at both baseline and 6 months. Of the participants, 25.4% (n = 30) screened positive for PTSD at 6 months. The entire sample showed a decline in risky alcohol use at 6 months (p = 0.0043). All PTSD-positive participants at 6 months were also positive for depression (p < 0.0001). For the entire sample, there was a 10% increase in depression from baseline to 6 months (p = 0.03). However, for those participants who were PTSD positive at 6 months, there was a 53% increase in depression from baseline (p = 0.0002) as compared with the group at 6 months without PTSD. Statistically significant differences were found between PTSD-positive and PTSD-negative participants regarding age (40.1 [15.9] vs. 50.9 [18.2], p = 0.0047), male (77% vs. 50%, p = 0.0109), penetrating injury (30% vs. 4%, p < 0.0001), PTSD history (17% vs. 4%, p = 0.0246), or other psychiatric condition (63% vs. 19%, p ≤ 0.001).

CONCLUSION: PTSD was not associated with risky alcohol use at 6 months. Surprisingly, risky alcohol use declined in both groups. Incidence of PTSD (25.4%, n = 30) and risky alcohol use (25%, n = 29) were equal at 6 months. Although the American College of Surgeons' Committee on Trauma requires brief screening and intervention for risky alcohol use owing to societal impact, reinjury rates, and cost effectiveness, our study suggests that screening for psychological conditions may be equally important.

LEVEL OF EVIDENCE: Prognostic study, level III.