In women, there is a positive association between rotating night shift work and the risk of developing type 2 diabetes and, furthermore, long duration of shift work may be associated with greater weight gain. These findings from a study by Frank Hu and colleagues from Harvard School of Public Health in Boston, USA, published in this week's PLoS Medicine, are of potential public health significance as a large proportion of the working population is involved in some kind of permanent night and rotating night shift work.
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