The value of sleep consistency

NY Times -  Sleep consistency refers to how well you maintain the same bedtime and wake-up time, give or take 30 minutes — and that includes weekends, said Jean-Philippe Chaput, a professor of medicine at the University of Ottawa.

Research suggests that most adults in the United States do not have a consistent sleep schedule. And that may be harming their health, Dr. Chaput said...

In a 2020 study, researchers analyzed the sleep patterns of nearly 2,000 adults aged 45 to 84 in the United States. They concluded that those with the most irregular sleep schedules were more than twice as likely to develop cardiovascular disease than those with more regular sleep patterns.

In another study published in 2024, researchers analyzed sleep data from more than 88,000 adults in the United Kingdom and assigned “sleep regularity” scores to all of them. Those who scored lowest, meaning they had the most irregular sleep schedules, were about 50 percent more likely to develop dementia than those who scored in the middle of the range.