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"We know that having diabetes may be associated with an increased risk of having a first stroke," said study author Dr. Moon-Ku Han, of Seoul National University College of Medicine. "But our results indicate that there is an optimal blood sugar level that may start to minimize the risk of having another stroke, a heart attack or other vascular problems, and it's right in the 6.8% to 7% range."
Participants had an average A1C of 7.5%. Anything above 6.5% typically shows diabetes, while levels below 5.7% are considered normal.
The study found participants' risk for a heart attack or similar vascular diseases was 27% greater when they were admitted to the hospital with A1C levels above 7%, compared to those admitted with A1C levels below 6.5%. Their risk for stroke was 28% greater when admitted with A1C levels above 7%, compared to those below 6.5%.
The findings were published online Sept. 29 in the journal Neurology.
Researchers noted that one limitation of the study is that blood sugar levels were only tested at the outset.
SOURCE: American Academy of Neurology, news release, Sept. 29, 2021
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