Drinking excessively can cause serious health risks and is responsible for an average of 88,000 U.S. deaths every year. But the vast majority of excessive drinkers are not alcoholics, according to new government data.

Nine out of 10 excessive drinkers are not dependent on alcohol, revealed a study released last week by the Centers for Disease Control and Prevention and the Substance Abuse and Mental Health Services Administration. The study is one of the first national, multi-year looks at alcoholism among excessive drinkers, and it debunks the assumption that most excessive drinkers are dependent on alcohol.

About 10 percent of people who drank excessively also met the clinical definition for alcohol dependence. The vast majority of excessive drinking is binge drinking, a pattern of behavior in which men consume roughly five or more drinks and women consume four or more within a short period of time.

But the big takeaway here isn’t that people who drink too much don’t need to worry about their habits, said study author Bob Brewer of the CDC. Rather, the study shows that combating excessive drinking as a public health problem needs to go beyond focusing only on alcoholism, a chronic medical condition.

“Knowing that nine out of 10 people who drink too much are not alcohol-dependent in no way diminishes the impact of alcohol dependence as a problem. It just says the problem we’re dealing with is bigger than that,” Brewer said.

Alcohol dependence is a “medical problem” and “based on the consequences and the science and symptoms of someone’s drinking behavior,” Brewer said. While about one in three adults drinks excessively, only one in 30 meets the clinical definition for alcohol dependence.

The study also found that excessive and binge drinking, as well as alcoholism, was most common among 18-to-24-year-old men, with binge drinking most prevalent among people coming from households with an annual income of $75,000 or more. But alcoholism was most common among people who had family incomes of less than $25,000 and people who reported binge drinking 10 or more times in the past 30 days.

The data comes from three years of the National Survey on Drug Use and Health, in which 138,100 Americans answered questions about their drinking habits. Because all of the information was self-reported, rates of binge drinking and alcoholism are likely to have been underestimated, the study authors noted.