How to Identify Hostility and Agitation in Schizophrenia
How can clinicians identify when a patient with schizophrenia meets this study's hostility or agitation symptom thresholds?
Patients with schizophrenia often present with hostility, agitation, or both, and these symptoms can worsen functioning and increase the risk of escalation into aggressive behavior. This guide applies when clinicians want to classify symptom burden using the same definitions used in Effects of Brexpiprazole on Functioning in Patients With Schizophrenia Who Have Hostility and Agitation Symptoms: Post Hoc Analysis of Short- and Long-Term Trials.
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Rate hostility with the PANSS P7 item
Assess the Positive and Negative Syndrome Scale hostility item, P7, which captures verbal and nonverbal expressions of anger and resentment, including sarcasm, passive-aggressive behavior, verbal abuse, and assaultiveness. Score severity on the 7-point PANSS scale from 1 for absent to 7 for extreme.
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Classify baseline hostility at a P7 score of 3 or higher
In this analysis, baseline hostility was defined as a PANSS P7 score of 3 or greater, corresponding to mild severity or worse. Patients scoring below 3 were classified as not having baseline hostility by the study definition.
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Rate agitation with the PANSS-Excited Component
Assess agitation using the PANSS-Excited Component, which sums 5 PANSS items: excitement P4, hostility P7, tension G4, uncooperativeness G8, and poor impulse control G14. The total score ranges from 5 to 35, with higher scores indicating greater agitation severity.
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Classify baseline agitation using both total and item thresholds
In this analysis, baseline agitation required a PANSS-EC total score of 14 or higher and at least 1 of the 5 component items rated 4 or higher, indicating moderate severity or worse on at least one agitation-related symptom. A patient did not meet the study's agitation threshold unless both conditions were present.
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Define follow-up response using the study cutoffs
Hostility response was defined as a shift from baseline hostility to a PANSS P7 score below 3, meaning absent or minimal hostility. Agitation response was defined as at least 40% improvement in PANSS-EC, the threshold the article notes is widely used in acute agitation and linked to a clinician global rating of much improved.
Clinical Considerations
- Hostility in this analysis was measured with a single PANSS item because validated hostility inventories were not included in the trials.
- The PANSS-EC response definition was developed for acute episodes of agitation, not specifically for 6-week schizophrenia trials.
- These thresholds were used for a post hoc exploratory analysis and should be interpreted as study definitions rather than a validated standalone clinical algorithm.
Bottom Line
Use PANSS P7 of 3 or higher to identify hostility and PANSS-EC of 14 or higher plus at least one item rated 4 or higher to identify agitation, because those were the exact symptom thresholds used in this schizophrenia analysis.
