About one-third of the service personnel surveyed met the criteria indicating hazardous drinking and possible alcohol use disorder, with 30 percent reporting that they binge drank in the past month. Among Marines, that figure jumped to 42.6 percent.

Binge drinking is defined as more than five drinks for men or more than four for women in one sitting, according to the report, issued by Rand and based on a survey that was conducted from late 2015 to early 2016.

That rate was down from 33.1 percent in the previously reported survey from 2011, but it’s still high enough to cause concern, researchers said. Drinking problems could be addressed by shifting the culture and climate surrounding alcohol use, such as communicating disapproval of heavy drinking and changing on-base alcohol and sales policies, according to the report.