More than half of the violent offenders studied by researchers in Sweden had consumed alcohol within 24 hours of committing the crimes that landed them in prison, Medical News Today reported Dec. 22.

The Karolinska Institute study found that 58 percent of the 133 offenders studied drank shortly before their violent incidents. Researchers calculated that the relative risk of violence increases 13.2-fold within 24 hours of alcohol consumption.

Also associated with increased risk of violence was use of other drugs, such as benzodiazepines and antidepressants. But, “Alcohol seems to have the largest triggering effect on violence compared to other substances we investigated. This suggests that treatment for individuals at risk for violence should be focused on decreasing their alcohol consumption,” said Ulrika Haggard-Grann of the Karolinska Institute.