Peter Jongho Na, MD, MPH

Department of Psychiatry, Yale School of Medicine, New Haven, Connecticut; VA Connecticut Healthcare System, West Haven, Connecticut

JCP
Geographic Differences in Cannabis Use and Cannabis Use Disorder in the US Veteran Population
Original Research

January 19, 2026

Significant regional differences were observed in cannabis use and cannabis use disorder (CUD). Veterans in the Pacific region had the highest rates of cannabis use and CUD.
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JCP
Social Support and Suicidal Thoughts and Behaviors
Original Research

December 5, 2022

Greater diversity of social networks was more strongly associated with lower risks of suicidal thoughts and behaviors than perceived strength of social support.
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JCP
Increased Admissions for Substance Use Disorder Among Older Adults, 2000–2017
Original Research

March 28, 2022

From 2000 to 2017, the number of older adults admitted for substance use disorder treatment increased by 203.7%, as compared to 13.0% in younger adults. This study looks at...
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Consensus Report on XT Use in Practice

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Figure: Graphic promoting Consensus Report on Xanomeline-Trospium; colorful net design shown with JCP logo in lower left.

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