People with hyperthyroidism should have it treated to reduce their risk, experts say
THURSDAY, April 1 (HealthDay News) -- Young adults who have an overactive thyroid face a much greater risk of stroke than people without the condition, Taiwanese researchers report.
"This is a well-controlled analysis, and patients with hyperthyroidism should receive prompt treatment to prevent these complications," Dr. Majaz Moonis, director of stroke services at the University of Massachusetts in Worcester.
Whether hyperthyroidism causes stroke or is a marker for other risk factors isn't known, but Moonis said the study results are not surprising. "Patients with hyperthyroidism have greater hypertension and atrial fibrillation, which is well-documented," he said.
For the study, published online April 1 in Stroke, a team led by Herng-Ching Lin from the School of Health Care Administration in the College of Medicine at Taipei Medical University collected data on 3,176 young adults with hyperthyroidism. They compared these people with 25,408 similar people who did not have hyperthyroidism. The average age was 32.
The researchers followed the patients for five years. During that time, 198 people (0.7 percent) suffered a stroke, including 31 (1 percent) of patients with hyperthyroidism and 167 (0.6 percent) without it, the researchers found.
After taking into account factors such as age, sex, income, environment, high blood pressure, diabetes, an irregular heart rhythm called atrial fibrillation, high cholesterol, coronary heart disease and whether they were taking medication to treat heart rhythm problems, the risk of having a stroke was 44 percent higher for patients with hyperthyroidism than for those without it, Lin's team found.
This is the first study to document a link between stroke and overactive thyroid in people under 45, he said.
"Our study shows an association between hyp
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