Study Shows Stricter Alcohol Policies Are Associated with Reduction in Homicides

Alcohol consumption is involved in a large proportion of homicides and suicides each year in the United States, but there has been limited evidence on how policies targeting alcohol use influence violence. A statistical analysis新しいタブ／ウィンドウで開く in the American Journal of Preventive Medicine新しいタブ／ウィンドウで開く, published by Elsevier, indicates that more restrictive alcohol policy environments are associated with a reduction in specific states’ homicide rates. 

Lead investigator James P. Murphy, PhD, RAND Corporation, Santa Monica, CA, says, "Previous studies have found a significant relationship between some state-level alcohol policies, such as the level of taxation and age-based restrictions, and crime rates, showing that more restrictive alcohol regulations are associated with a lower likelihood of alcohol involvement among homicide victims. However, the effects of alcohol policies on population-level homicide and suicide rates are not well-understood."

The researchers assessed the association of alcohol policy changes with population-level changes in homicide and suicide rates using the Alcohol Policy Scale (APS), an established and comprehensive alcohol policy index that measures state-year alcohol policy environments. Higher APS percentile scores are indicative of more restrictive alcohol policies. The study sample included all 50 US states. Vital deaths data were drawn from the National Vital Statistics System (NVSS). 

To estimate the association between changes in a state’s APS score and changes in its homicide and suicide rates using data from 2002 to 2018, investigators applied a recently developed statistical model that, in similar policy settings, reduces bias in estimating the effects of policy changes on state-level rate outcomes compared to conventional approaches. 

Dr. Murphy continues, “We found that adopting more restrictive alcohol policies was associated with a reduction in homicide rates, but not suicide rates. Based on our results, we would expect a nationwide increase in policy restrictions equivalent to a shift from the 25th to 75th percentile of the APS score would correspond with 1200 fewer homicides annually."

More than 74,000 individuals died of homicide or suicide in 2021 in the US. While many homicide and suicide decedents are not tested for blood alcohol content (BAC), among those tested, over 40% had a measurable BAC level. A recent meta-analysis estimated that the percentage of deaths attributable to alcohol among those with known BAC levels or intoxication status was 29% for all homicides (considering alcohol use only by the offender) and 21% for all suicides. These findings suggest that alcohol regulations may have an important role to play in addressing violence-related morbidity and mortality, including the growing number of firearm deaths. 

Dr. Murphy concludes, "More restrictive alcohol policies may provide a promising approach to addressing the recent increases in homicides in the US. Further research is needed to identify the particular policies that are most effective, as well as to identify the particular mechanisms through which they affect homicide rates."

Notes for editors 

The article is “Relationships of State Alcohol Policy Environments With Homicides and Suicides,” by James P. Murphy, PhD, Rosanna Smart, PhD, Terry L. Schell, PhD, Nancy Nicosia, PhD, and Timothy S. Naimi, MD, MPH (https://doi.org/10.1016/j.amepre.2024.04.002新しいタブ／ウィンドウで開く). It appears online in advance of the American Journal of Preventive Medicine, volume 67, issue 2 (August 2024), published by Elsevier.  

The article is openly available at https://www.ajpmonline.org/article/S0749-3797(24)00114-4/fulltext新しいタブ／ウィンドウで開く.  

Full text of this article is also available to credentialed journalists upon request; contact Jillian B. Morgan at +1 734 936 1590 or [email protected]新しいタブ／ウィンドウで開く. Journalists wishing to interview the authors should contact Warren Robak, RAND Media Relations, at +1 310 795 0861 or [email protected]新しいタブ／ウィンドウで開く. 

This research was supported by funding from the National Institute on Alcohol Abuse and Alcoholism (National Institutes of Health, grant number R61AA029064). 

About the American Journal of Preventive Medicine 

The American Journal of Preventive Medicine新しいタブ／ウィンドウで開く is the official journal of the American College of Preventive Medicine新しいタブ／ウィンドウで開く and the Association for Prevention Teaching and Research新しいタブ／ウィンドウで開く. It publishes articles in the areas of prevention research, teaching, practice and policy. Original research is published on interventions aimed at the prevention of chronic and acute disease and the promotion of individual and community health. The journal features papers that address the primary and secondary prevention of important clinical, behavioral and public health issues such as injury and violence, infectious disease, women's health, smoking, sedentary behaviors and physical activity, nutrition, diabetes, obesity, and alcohol and drug abuse. Papers also address educational initiatives aimed at improving the ability of health professionals to provide effective clinical prevention and public health services. The journal also publishes official policy statements from the two co-sponsoring organizations, health services research pertinent to prevention and public health, review articles, media reviews, and editorials. www.ajpmonline.org新しいタブ／ウィンドウで開く 

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