title: The PSS-SR as a screening tool for PTSD in first-episode psychosis patients.
abstract: OBJECTIVE
  We examined the validity of the PTSD Symptom Scale - Self-Report (PSS-SR) as a screening instrument for post-traumatic stress disorder (PTSD) in patients recovering from first-episode psychosis.
  
  
  METHODS
  Sixty-one patients from the Early Psychosis Intervention Programme in Singapore completed the PSS-SR questionnaire. The Clinician-Administered PTSD Scale was administered by a blinded interviewer as the 'gold standard' to identify patients with PTSD. The sensitivity, specificity and receiver operating characteristic curve were used to determine the screening performance of the PSS-SR.
  
  
  RESULTS
  The score representing the optimal cut-off point for the PSS-SR was 14, with a sensitivity and specificity of 0.83 and 0.71, respectively. The area under the curve was determined to be 0.82 (95% CI: 0.70-0.95).
  
  
  CONCLUSIONS
  These data suggest that the PSS-SR can be a useful screening instrument for PTSD in patients recovering from their first psychotic episode.
authors.affiliation: Department of General Psychiatry, Singapore General Hospital, Singapore. sin.gwen.li@sgh.com.sg
authors.forename: Gwen-Li
authors.initials: GL
authors.lastname: Sin
authors.forename: Edimansyah
authors.initials: E
authors.lastname: Abdin
authors.forename: Jimmy
authors.initials: J
authors.lastname: Lee
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D011237:Predictive Value of Tests; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data*; D011618:Psychotic Disorders / Q000150:complications* / Q000175:diagnosis; D012372:ROC Curve; D015203:Reproducibility of Results; D057566:Self Report; D012680:Sensitivity and Specificity; D012846:Singapore; D013313:Stress Disorders, Post-Traumatic / Q000150:complications / Q000175:diagnosis*