One in three adults drinks excessively, according to the CDC. But that doesn’t automatically mean that person is an alcoholic, according to a new study published in the journal Preventing Chronic Disease.

CDC epidemiologist and study co-author Robert Brewer told The Salt:

“The reality of the situation is that most adults who drink, they’re drinking maybe a couple drinks during week and then typically drinking [larger] amounts on weekends.”

First, it’s important to define what constitutes “one drink.” The CDC researchers defined a drink as being 5 ounces of wine, 12 ounces of beer, or 1.5 ounces of spirits.

Next, men and women have different criteria for “excessive drinking.” Women who consume eight or more drinks per week are considered excessive drinkers. Meanwhile, the magic number is 15 drinks for men.

But as Brewer pointed out to The Salt, most excessive drinkers also follow more of a binge-drinking pattern, where they’ll consume four or more drinks on a single occasion.