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Compared with healthy sleep patterns, long and short sleep durations appear to almost double the likelihood of stroke in middle-aged individuals with hypertension, new research suggests. A cohort study of 200,000 hypertensive patients, presented  at the American Society of Hypertension (ASH) 2015 Annual Scientific Meeting, showed an adjusted odds ratio (OR) of 1.83 (95% CI 1.56–2.14) for stroke in the participants who slept less than 5 hours a night on average vs those who slept 7 to 8 hours a night. In addition, the OR for stroke was 1.74 (95% CI 1.68–1.80) for those who averaged more than 8 hours of sleep per night.

This was a bit of a surprise that this was U-shaped, but it was even more surprising to us that the risk for stroke was so big among the insufficient sleepers.