In a new British study, both nondrinkers and heavy drinkers exhibited higher likelihoods of experiencing the degenerative brain condition.
Middle-aged wine lovers might be helping out their future selves, a new study on alcohol and dementia suggests. Published this month in the BMJ, the study indicates a link between moderate drinking during midlife and a lower chance of developing dementia later on.
The findings are based on data from the Whitehall II study, an ongoing project tracking the health of British civil servants that were between the ages of 35 and 55 in 1985 (when the project began). For the new study, a team of French and British researchers gathered 23 years’ worth of follow-up data on 9,087 Whitehall II participants, including hospital records and self-reported levels of alcohol consumption.
The researchers classified participants who had fully abstained from alcohol, those who stopped drinking early in the study and those who infrequently drank during the study period as “abstainers.” Those who regularly drank were split into two additional groups: those who drank between 1 and 14 units of alcohol per week (the United Kingdom’s recommended intake for both men and women) and those who drank above that rate. (In this case, one unit is equivalent to 10 milliliters of pure alcohol, or a bit more than half of a standard 5-ounce glass of wine.)
Based on a total of 397 hospital-reported cases of dementia, the researchers found that the group that abstained from alcohol and the group that drank in excess of 14 units per week were both shown to be at a higher risk of developing dementia than participants who drank between 1 and 14 units. Additionally, among those who drank more than 14 units per week, every seven additional drinks per week increased dementia risk by 17 percent.
The study’s authors point out that the underlying causes for the increased risk are likely different for each of the two higher-risk groups. Abstainers, for example, were shown to have a higher prevalence of cardiometabolic disease (stroke, coronary heart disease, atrial fibrillation, heart failure and diabetes), which the study’s text explains could contribute to dementia development. The researchers also found that a history of hospital admission for alcohol-related diseases was associated with a four-times higher risk of dementia, thus supporting the idea that overconsumption confers a higher risk ….