Total number of questions
Scoring and interpretation
Evidence for the PCL-5 suggested 5 points as a minimum threshold for determining whether an individual has responded to treatment and 10 points as a minimum threshold for determining whether the improvement is clinically meaningful. A PCL-5 cut-point of 33 appears to be a reasonable value to use for provisional PTSD diagnosis.
Reliability and validity
The PCL-5 administered to an outpatient sample (N = 278) resulted in a Cronbach’s alpha of 0.94, test-retest reliability of r = 0.82, and convergent validity of rs = 0.74 to 0.85.