Night shift work and other determinants of estradiol, testosterone, and dehydroepiandrosterone sulfate among middle-aged nurses and midwives

The study examined the association between rotating night shift work and blood concentrations of selected sex hormones among nurses and midwives. A positive and significant association between the total duration of night shift work and estradiol level observed among postmenopausal women tends to support the hypothesis linking night shift work with increased risk of breast cancer.

Source: Juvani A, Oksanen T, Virtanen M, Elovainio M, Salo P, Pentti J, Kivimäki M, Vahtera J. Scand J Work Environ Health, 2016.

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