Initial research suggests that a PCL-5 cutoff score between 31-33 is indicative of probable PTSD across samples.
A provisional PTSD diagnosis can be made by treating each item rated as 2 = "Moderately" or higher as a symptom endorsed, then following the DSM-5 diagnostic rule which requires at least: 1 B item (questions 1-5), 1 C item (questions 6-7), 2 D items (questions 8-14), 2 E items (questions 15-20).DSM-5 symptom cluster severity scores can be obtained by summing the scores for the items within a given cluster, i.e., cluster B (items 1-5), cluster C (items 6-7), cluster D (items 8-14), and cluster E (items 15-20).
A total symptom severity score (range - 0-80) can be obtained by summing the scores for each of the 20 items. The PCL-5 can be scored in different ways: Interpretation of the PCL-5 should be made by a clinician. With the revised Life Events Checklist for DSM-5 (LEC-5) and extended Criterion A assessment. Without Criterion A (brief instructions and items only), which is appropriate when trauma exposure is measured by some other method. The PCL-5 can be administered in one of three formats: It takes approximately 5-10 minutes to complete. The PCL-5 is a self-report measure that can be completed by patients in a waiting room prior to a session or by participants as part of a research study. The change in the rating scale, combined with the increase from 17 to 20 items means that PCL-5 scores are not compatible with PCL for DSM-IV scores and cannot be used interchangeably. Rating scale descriptors are the same: "Not at all," "A little bit," Moderately," "Quite a bit," and "Extremely." The self-report rating scale is 0-4 for each symptom, reflecting a change from 1-5 in the DSM-IV version. 
The wording of PCL-5 items reflects both changes to existing symptoms and the addition of new symptoms in DSM-5.
The PCL-5 is a 20-item questionnaire, corresponding to the DSM-5 symptom criteria for PTSD. Although there is only one version of the PCL-5 items, there are three formats of the PCL-5 measure, including one without a Criterion A component, one with a Criterion A component, and one with the Life Events Checklist for DSM-5 (LEC-5) and extended Criterion A component. There are no corresponding PCL-M or PCL-C versions of PCL-5. PCL-5 is most similar to the PCL-S (specific) version. PCL for DSM-IV has three versions, PCL-M (military), PCL-C (civilian), and PCL-S (specific), which vary slightly in the instructions and wording of the phrase referring to the index event. Several important revisions were made to the PCL in updating it for DSM-5: When necessary, the PCL-5 can be scored to provide a provisional PTSD diagnosis. The gold standard for diagnosing PTSD is a structured clinical interview such as the Clinician-Administered PTSD Scale (CAPS-5). Monitoring symptom change during and after treatment. The PCL-5 has a variety of purposes, including: The PCL-5 is a 20-item self-report measure that assesses the 20 DSM-5 symptoms of PTSD. PTSD SYMPTOMS DSM 5 SOFTWARE
VA Software Documentation Library (VDL).Clinical Trainees (Academic Affiliations).War Related Illness & Injury Study Center.
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