The authors wrote that the risk of stroke 14 years earlier than expected among people who consume at least three alcoholic beverages per day is considerably higher among regular heavy drinkers.
Why exactly heavy drinking increases early stroke risk is still unclear, the scientists wrote.
Team leader, Charlotte Cordonnier, MD, PhD, said:
"Heavy drinking has been consistently identified as a risk factor for this type of stroke, which is caused by bleeding in the brain rather than a blood clot.
Our study focuses on the effects of heavy alcohol use on the timeline of stroke and the long-term outcome for those people."
The researchers interviewed 540 people who had had an intracerebral hemorrhage, a type of stroke caused by bleeding in the brain, not a blood clot. They had an average age of 71 years. They, their caregivers or relatives were asked about their drinking habits.
25% (137) of all the people they assessed were classified as "heavy drinkers". In this case, heavy drinking meant they were consuming at least 1.6 ounces of pure alcohol daily; approximately three alcoholic drinks.
The authors also checked the participants' medical records and carried out CT brain scans.
They found that:
- Regular heavy drinkers had a stroke at an average age of 60 years. This is 14 years earlier than for people who do not drink heavily.
- Among younger patients who had a stroke in the deep part of the brain, the heavy drinkers had a considerably greater chance of dying within 24 months than their non-heavy drinking counterparts. (Younger victims refers to patients younger than 60)
- ..to be tobacco smokers
- .. to show some evidence of blood irregularities which raise their risk of suffering from a bleeding stroke
- .. to suffer falls
- .. to experience liver problems.
"It's important to keep in mind that drinking large amounts of alcohol contributes to a more severe form of stroke at a younger age in people who had no significant past medical history."
The authors emphasized that heavy drinking is only a risk factor for early stroke, and not a cause in itself.
Heavy drinking already linked to several disease risksPrevious studies have linked heavy drinking to a higher risk of developing several different diseases and conditions:
- A 2009 carried out by an multinational group of scientists found that heavy drinking considerably raises the risk of developing gastric cancers
- Scientists from the American Cancer Society, Atlanta, found that heavy regular drinking raises the risk of developing pancreatic cancer
- A study published in December 2011 in the Journal of Alzheimer's Disease reported that heavy drinking significantly raises the risk of cognitive impairment
- Dr. Zhihong Gong and team, from the University of California San Francisco, reported that daily heavy drinking increases the risk of high-grade prostate cancer, making preventive drugs ineffective.
- Scientists from Wellesley College in Wellesley, MA, USA, found that long-term heavy drinking shrinks the brain
The Economic Burden of Heavy DrinkingIn 2006, the CDC (Centers for Disease Control and Prevention) reported that heavy drinking cost the American economy $224 billion in one year, or $1.90 per drink consumed.
The authors added that alcohol abuse is a growing problem in most of the developed nations, including the United Kingdom. About 79,000 lives are lost each year in America because of heavy drinking.
Alcohol consumption per capita (per person) is much higher in industrial nations, as are the incidences of stroke
Written by Christian Nordqvist