Waking up early? You may be less likely to develop breast cancer: Study

Women who wake up early may have a lower risk of developing breast cancer than the females sleeping for longer hours, a study has found.

Using a technique called Mendelian randomisation, researchers analysed genetic variants associated with three particular sleep traits -- morning or evening preference (chronotype), sleep duration, and insomnia.

They analysed databases of more than four lakh women from two studies -- UK Biobank study and Breast Cancer Association Consortium (BCAC) study.

In observational analysis of UK Biobank data, morning preference was associated with a slightly lower risk of breast cancer (one less woman per 100) than evening preference, whereas there was little evidence for an association with sleep duration and insomnia symptoms.
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