Unexpected Link Between Light Drinking and Dementia Risk

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Unexpected Link Between Light Drinking and Dementia Risk

Drinking one or two cocktails a day may protect against dementia, while having three or more could increase risk, new research suggests.

Investigators assessed dementia risk using changes in alcohol consumption over a 2-year period in nearly four million people in Korea. After about 7 years, dementia was 21% less likely in mild drinkers and 17% less likely in moderate drinkers. Heavy drinking was linked to an 8% increased risk.

Other studies of the relationship between alcohol and dementia have yielded mixed results, and this study does little to clear those murky waters. Nor do the results mean that drinking is recommended, the investigators note.

But the study does offer new information on how risk changes over time as people change their drinking habits, lead investigator Keun Hye Jeon, MD, assistant professor of family medicine at Cha Gumi Medical Center at Cha University, Gumi, Korea, told Medscape Medical News.

“Although numerous studies have shown a relationship between alcohol consumption and dementia, there is a paucity of understanding as to how the incidence of dementia changes with changes in drinking habits,” Jeon said.

“By measuring alcohol consumption at two time points, we were able to study the relationship between reducing, ceasing, maintaining, and increasing alcohol consumption and incident dementia,” he added.

The findings were published online February 6 in JAMA Network Open.

JAMA Netw Open. Published online February 6, 2023. Full text

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