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Nationwide, roughly a third of all visits to emergency rooms for injuries are alcohol related. Now a new study suggests that certain beverages may be more likely to be involved than others.

The study, carried out over the course of a year at the Johns Hopkins Hospital in Baltimore, found that five beer brands were consumed most often by people who ended up in the emergency room. They were Budweiser, Steel Reserve, Colt 45, Bud Ice and Bud Light.

Three of the brands are malt liquors, which typically contain more alcohol than regular beer. Four malt liquors accounted for nearly half of the beer consumption by emergency room patients, even though they account for less than 3 percent of beer consumption in the general population.

Previous studies have found that alcohol frequently plays a role in emergency room admissions, especially those stemming from car accidents, falls, homicides and drownings, said the lead author of the study, David H. Jernigan of the Johns Hopkins Bloomberg School of Public Health. The new study, published in the journal Substance Use and Misuse, is the first to look at whether certain brands or types of liquor are overrepresented.

Dr. Jernigan said that the breakdown of liquor consumption in the study may be particular to Baltimore, and that he and his colleagues are hoping to study other cities as well. The findings could have policy implications, potentially influencing labeling requirements and marketing for higher-alcohol beers, Dr. Jernigan said.