A Mysterious Link Between Sleeplessness and Heart Disease

People who don’t get much sleep are more likely than those who do to develop calcium deposits in their coronary arteries, possibly raising their risk for heart disease, a new study has found.
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After accounting for various other causes, the researchers concluded that one hour more of sleep per night was associated with a 33 percent decrease in the odds of calcification, comparable to the heart benefit gained by lowering one’s systolic blood pressure by 17 millimeters of mercury.