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Women Who are Early Risers Have Lower Risk of Breast Cancer

by Dr. Lakshmi Venkataraman on June 27, 2019 at 5:38 PM
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Highlights:

Women who wake up early have almost half the risk of developing breast cancer compared to night owls who are active during the evening hours and go to bed late, according to a recent UK study.


The study was conducted at the University of Bristol and appears in the British Medical Journal. The authors had earlier presented the findings at the National Cancer Research Institute Conference (NCRI) in Glasgow.

Aim of the Study

Previous research indicates a link between working night shift and increased breast cancer risk, believed to be caused by a disruption in sleep patterns, exposure to the bright environment, and other lifestyle factors. However, not much data is available on the potential impact of sleep habits and breast cancer risk.

‘Evening persons or night owls have a gene mutation resulting in their body clock to lag behind, making them go to bed late and wake up later than usual in the morning. New study suggests that this gene mutation may increase the risk of breast cancer, making women who are night owls more prone to breast cancer.’

The study team set out to determine whether certain sleep traits could influence breast cancer risk.

Analyzing Risk of Breast Cancer in Larks Vs Owls

Dr. Rebecca Richmond, lead scientist from the University of Bristol, "The findings of a protective effect of morning preference on breast cancer risk in our study are consistent with previous research highlighting a role for night shift work and exposure to "light-at-night" as risk factors for breast cancer."

Potential Merits & Demerits

Scope of the Study

In summary, morning persons have a lower risk of breast cancer in comparison to late risers and these findings suggest that changing sleep behavior can improve health and reduce the risk of cancer or other chronic diseases.

References:

  1. Investigating Causal Relations Between Sleep Traits and Risk of Breast Cancer in Women: Mendelian Randomisation Study - (https:doi.org/10.1136/bmj.l2327)


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