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Work Days of 11 Hours Boost Risk for Heart Disease, Study Says

Working overtime may be a killer, according to research that finds long hours on the job is a heart risk along with smoking, bad cholesterol and high blood pressure.

Adults who worked 11 hours a day or more had a 67 percent higher risk of developing coronary heart disease than those who worked an 8-hour shift, a study today in the Annals of Internal Medicine found. The researchers found that by adding working hours to a standard heart risk assessment model they could increase the accuracy of heart disease predictions by 5 percent.