The study involved 18,567 people with diabetes with an average age of 70. All participants were admitted to the hospital for an ischemic stroke, which is caused by a blood clot. Upon admission, researchers used a test called the hemoglobin A1C to determine people’s average blood sugar level over the past two to three months.
This test measures a percentage of hemoglobin proteins in the blood coated with sugar. A level below 5.7% is considered normal; 6.5% or higher generally indicates diabetes. The participants had an average A1C of 7.5%.
Researchers then followed up one year later to find out if there was an association between A1C levels with the risk of having another stroke, a heart attack, or dying from these or other vascular causes.
Of all participants, 1,437, or about 8%, had a heart attack or died from vascular disease within a year of starting the study, and 954, or 5%, had another stroke.
The study found that people admitted to the hospital with A1C levels above the 6.8% to 7.0% range had an increased risk of having a vascular event like a heart attack, as well as having another stroke.
After adjusting for factors like age and sex, researchers found that people’s risk for a heart attack or similar vascular diseases was 27% greater when they were admitted to the hospital with A1C levels above 7.0%, compared to those admitted with A1C levels below 6.5%.
People’s risk for having another stroke was 28% greater when admitted to the hospital with A1C levels above 7.0%, compared to those below 6.5%.
“Our findings highlight the importance of keeping a close eye on your blood sugar if you’re diabetic and have had a stroke,” Han said.
A limitation of the study is that people’s blood sugar levels were measured only at the start of the study; no follow-up levels were available.
Source: Medindia
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