Integrated healthy sleep index served as a marker of cardiovascular events

A relationship was found between healthy sleep characteristics and the risk of cardiovascular events. With 4-5 optimal sleep characteristics, 30-60% of cardiovascular events can potentially be prevented.

Scientists from the University of Paris Cité, the Cardiovascular Research Center of Paris and the University Hospital of Lausanne studied the effect of five characteristics of healthy sleep on the risk of cardiovascular events in people without a history of cardiovascular disease. The study results were published in the European Heart Journal.

The primary analysis found that each point increase in healthy sleep scores reduced the risk of cardiovascular disease by 18%. Repeated analyzes found similar results: the risk of cardiovascular disease decreased by 16% for each 1-point increase in healthy sleep scores over the next 2 to 5 years of follow-up.

Data from 11,347 people without cardiovascular disease aged 53 to 64 years were analyzed. During 8.9 years of follow-up, 499 newly diagnosed cardiovascular events were recorded: 339 participants were diagnosed with coronary heart disease for the first time, and 175 patients had a first stroke. During the subsequent 6-year follow-up period, an additional 262 newly diagnosed cardiovascular events were recorded (194 patients diagnosed with coronary artery disease for the first time and 72 with a first stroke).

The healthy sleep score (from 0 to 5 points) was calculated taking into account five parameters: early chronotype, sleep duration (7-8 hours per day), absence of insomnia, sleep apnea and daytime sleepiness.

The authors noted that 30 to 60 percent of new cases of cardiovascular disease could be prevented if all study participants achieved an integrated sleep score of 4 to 5.

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