In a new study, researchers found people who have trouble sleeping may be more likely to have a stroke, heart attack or other heart diseases.
The research was conducted by a team at Peking University.
The team examined 487,200 people in China with an average age of 51. Participants had no history of stroke or heart disease at the beginning of the study.
Participants were asked if they had any of three symptoms of insomnia at least three days per week: trouble falling asleep or staying asleep; waking up too early in the morning, or trouble staying focused during the day due to poor sleep.
A total of 11% of the people had difficulty falling asleep or staying asleep; 10% reported waking up too early, and 2% had trouble staying focused during the day due to poor sleep.
The researchers did not determine if the people met the full definition of insomnia.
The people were then followed for an average of about 10 years. During that time, there were 130,032 cases of stroke, heart attack, and other similar diseases.
The team found that people who had all three symptoms of insomnia were 18% more likely to develop these diseases than people who did not have any symptoms.
People who had trouble falling asleep or staying asleep were 9% more likely to develop stroke or heart disease than people who did not have this trouble.
Of the 55,127 people who had this symptom, 17,650, or 32%, had a stroke or heart disease, compared to 112,382, or 26%, of the 432,073 people who did not have this symptom of insomnia.
People who woke up too early in the morning and could not get back to sleep were 7% more likely to develop these diseases than people who did not have that problem.
And people who reported that they had trouble staying focused during the day due to poor sleep were 13% more likely to develop these diseases than people who did not have that symptom.
The link between insomnia symptoms and these diseases was even stronger in younger adults and people who did not have high blood pressure at the start of the study.
These results suggest that if doctors can target people who are having trouble sleeping with behavioral therapies, it’s possible that they could reduce the number of cases of stroke, heart attack and other diseases later down the line.
The lead author of the study is Liming Li, MD, of Peking University in Beijing, China.
The study is published in Neurology, the medical journal of the American Academy of Neurology.
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