Night owls are more likely to develop type 2 diabetes.
People who like to go to bed late are 19 percent more likely than the lark to develop the disease.
But the risk may be more to do with the lifestyle choices that often go with being a night owl, say researchers from the Brigham and Women’s Hospital.
They analysed data from 63,676 female nurses, which included their sleeping patterns, diet, smoking, alcohol use, and exercise.
On its own, being a night owl raised the risk of diabetes by 72 percent, but this reduced to an average of 19 percent when other lifestyle habits were factored in; the healthiest night owls had just a 6 percent raised risk, but the unhealthiest had a 25 percent increased risk.
The night owls were more likely to drink more alcohol than the larks, eat low-quality food, get too little sleep, and smoke, the researchers said.
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