Fig. 1
From: Trends in alcohol and marijuana detected in homicide victims in 9 US states: 2004–2016
Prevalence of Alcohol and Marijuana Detected in Homicide Victims by Calendar Year: National Violent Death Reporting System; Colorado, Georgia, Massachusetts, New Jersey, Oregon, Rhode Island, South Carolina, Virginia, and Wisconsin; 2004–2016. Note. Cochran-Armitage χ2 test for trend: alcohol (Z = 1.46; P = .143); marijuana (Z = -15.67; P < .001); both substances (Z = -7.90; P < .001)