PTSD severity and diagnostic status were assessed using the 30-item CAPS-5 (score range, 0-80; higher scores indicate more severe PTSD) structured interview31 with lifetime number and type of traumatic events assessed via the 17-item Life Events Checklist.32 The CAPS-5 has strong psychometric properties.31 A clinician (M.S.) masked to the randomization arm conducted the interviews. Depression was assessed using the Patient-Reported Outcomes Measurement Information System (PROMIS) depression measure (PROMIS scores are reported as a standardized T-score, which represents a mean [SD] of 50 [10] points; higher scores indicate worse depression),33 which has high internal consistency (Cronbach α = 0.979)34 and precision. Other VA mental health care received by participants between baseline and 6-month follow-up was extracted from VA databases, and days of mental health treatment received for each treatment arm were calculated.

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