Health Care

Early risers less likely to develop breast cancer, new study reveals

Early risers less likely to develop breast cancer, new study reveals”

Women taking part in the study included 180,215 participants in the UK Biobank project, which stores medical research data on 500,000 individuals.

Led by Dr Rebecca Richmond at the University of Bristol, UK, along with the University of Manchester, the University of Exeter, and United States and Norwegian researchers, the large-scale study looked at data from taken from 409,166 women to investigate how a person's preference for mornings or evenings as well as their sleep habits may contribute to the development of breast cancer.

The samples from BCAC showed that those with lark variants had a 40 percent lower risk of developing breast cancer than those with night owl variants.

Women who get more than the recommended seven to eight hours of sleep a night also have a higher risk of developing breast cancer, about 20 percent more for each hour over the recommended amount, the study found.

Basically, one in 100 women who label themselves as morning people developed breast cancer, while two in every 100 women who aren't morning people develop it. "More work is needed to understand why sleep characteristics may be linked to breast cancer risk", said Breast Cancer Care clinical director Emma Pennery.

The researchers said they would like to perform further work because the estimates were based on questions related to morning or evening preference rather than actually whether people get up earlier or later in the day.

They also found some evidence for a causal effect of increased sleep duration and sleep fragmentation on breast cancer.

The researchers believe their findings have implications for policy-makers and employers.

Because these bits of DNA are set at birth and are not linked to other known causes of cancer, like obesity, it means the researchers are reasonably confident body clocks are involved in cancer. They used a clever new way of analysing data - called Mendelian randomisation. The team presented their findings at the NCRI Cancer Conference in Glasgow, Scotland, while their paper, published on bioRxiv, awaits peer review. Around 4% of U.S. cancer deaths were linked to drinking alcohol and the Breast Cancer Now charity warns that any alcohol intake increases the risk of breast cancer. "This helps to avoid misleading conclusions that could have been affected by confounding factors". According to Cancer Research UK, around a quarter of cases might be preventable.

The National Cancer Research Institute (NCRI) is a UK-wide partnership of cancer research funders, established in 2001.

AXA Mansard, a member of AXA, a global leader in insurance and asset management, said it joined in the observance of the concluded breast cancer awareness.

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