Primary outcomes were the Posttraumatic Diagnostic Scale (PDS) 25,26 for PTSD symptoms and the Symptom Checklist
Depression Scale (SCL - 20) for depressive symptoms.27 The PDS (17 items) assesses severity of PTSD symptoms over the prior 4 weeks with high internal consistency and test - retest reliability26; scores are summed and range from 0 to 51; scores of 10 or less are mild; 11 to 20,
moderate; 21 to 35,
moderate to severe; and
at least 36, severe.