Late nights may impact diabetes

A US study in 194 people with type 2 diabetes asked about their habitual sleep duration, quality and timing. It showed chronotype, an individual’s preference for being a morning or evening person, was significantly correlated with HbA1c.

The authors said each hour delay in a person’s midpoint of sleep on days not dictated by work schedules – known as midsleep time on free days (MSF) and a measure of chronotype – was associated with an increase in HbA1c of 2.5% of its original value after

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