A link between alcohol consumption and stroke?

This study examined the link between alcohol consumption and stroke. The authors concluded that light consumption of alcohol could decrease the risk of ischemic stroke. In contrast, they noted that heavy consumption of alcohol increased the risk of all types of stroke.

Light alcohol consumption is considered beneficial in terms of preventing cardiovascular disease. This topic is controversial however, as moderate-heavy consumption leads to several health problems. The association between alcohol and stroke risk has not been clearly defined for different types of stroke including ischemic (blocked artery stopping blood to the brain) and hemorrhagic (burst blood vessel in the brain) stroke. It is therefore unknown whether light consumption is protective against certain types of stroke.

This study summarized evidence looking at the relationship between alcohol consumption and stroke type. It included data from 27 studies with a combined total of 22825 patients. Alcohol consumption was assessed by a self-administered questionnaire or an interview.

Light consumption (less than 2 drinks per day) was associated with an 8 to 10% a lower risk of ischemic stroke. Moderate-heavy consumption (greater than 2 drinks per day) was associated with an 8 to 14% increased risk of ischemic stroke.

There was no protective link between light alcohol consumption and hemorrhagic stroke. However, high alcohol consumption (more than 4 drinks per day) had a 67 to 82% increased risk of hemorrhagic stroke.

The authors concluded that light consumption of alcohol had a protective affect against ischemic stroke. Heavy alcohol consumption was linked to a greater risk of all types of stroke.