- PTSD ONLY - score of 1.0 standard deviation above the mean on the PTSD Checklist-Civilian (PCL-C), or score meets PCL-C symptom cluster criteria for 3 symptom clusters (i.e. re-experiencing, numbing and avoidance combined, and hyperarousal) or 4 symptom clusters (i.e., re-experiencing, numbing only, avoidance only, and hyperarousal); or