Related Experiment Video
Updated: Jul 15, 2026

Brain Morphology of Cannabis Users With or Without Psychosis: A Pilot MRI Study
Published on: August 18, 2020
Base rates of firearm possession by hospitalized psychiatric patients
Dale E McNiel1, Christopher M Weaver, Stephen E Hall
1Department of Psychiatry, University of California, San Francisco, 401 Parnassus Ave., San Francisco, CA 94143-0984, USA. dalem@lppi.ucsf.edu
Objective:
The authors assessed base rates of firearm possession reported by hospitalized psychiatric patients.
Methods:
The study involved retrospective review of the charts of 100 patients consecutively admitted after a hospital had incorporated routine firearm screening in the workup done at admission and the charts of 100 patients who had been consecutively admitted during an earlier interval when firearm screening had been done on an as-needed basis.
Results:
Whereas one patient (1%) acknowledged having access to a firearm when screening had been done on an as-needed basis, under conditions of routine screening, nine patients (9%) reported owning or having access to a firearm.
Conclusions:
A substantial proportion of hospitalized patients have access to firearms. Unless patients are directly asked about firearm access, this information may not come to the attention of health care providers. Strategies to manage the risk of suicide and violence by hospitalized patients may benefit from routine assessment of firearms possession.
Related Concept Videos
Psychosis: Goals of Pharmacotherapy
Psychosis and Antipsychotic Drugs: Overview
Healthcare Associated Infections II: Preventive Measures
The best practices for preventing healthcare-associated infections include hand hygiene, patient risk...
Standard Precaution
Hand hygiene is the most crucial means to prevent the transmission of disease. Employers are legally required to provide their workers with personal protective equipment (PPE) to minimize exposure or contact with...
SBAR I: Understanding the Concept
Standardized methods of communication have been developed to ensure that information is...
Pharmaceutical Poisoning: Potential Scenarios
