How the PCL-5 is scored
The PCL-5 lists the 20 symptoms of posttraumatic stress disorder in DSM-5. You keep your worst stressful event in mind and rate how much each problem bothered you in the past month, from 0 (Not at all) to 4 (Extremely). Adding the 20 ratings gives a total from 0 to 80.
The items map onto the four DSM-5 symptom clusters, and this calculator shows each subtotal:
- Cluster B, intrusions (items 1-5, max 20): unwanted memories, nightmares, flashbacks, and reactions to reminders.
- Cluster C, avoidance (items 6-7, max 8): avoiding thoughts or external reminders.
- Cluster D, negative changes in mood and thinking (items 8-14, max 28).
- Cluster E, arousal and reactivity (items 15-20, max 24): irritability, risk-taking, hypervigilance, startle, concentration, and sleep.
The National Center for PTSD also describes a symptom-pattern rule: treat any item rated 2 (Moderately) or higher as endorsed, then check for at least 1 B item, 1 C item, 2 D items, and 2 E items.