Morning people have a lower risk of breast cancer

  • Morning people have a lower risk of breast cancer

Morning people have a lower risk of breast cancer

Interestingly, the study also found that sleeping longer isn't necessarily better, as the analysis showed that women who slept longer than the recommended seven to eight hours per night increased their chances of being diagnosed with breast cancer by 20% per additional hour.

The latest study looked at data on more than 400,000 women drawn from the UK Biobank, a charitable project, and a database held by the global...

The consortium has the largest collection of genetic data on women with breast cancer obtained so far. British researchers analyzed two data banks that included more than 409,000 women to investigate the link between sleep traits and breast cancer risk.

But they caution that it's too early to say whether being a night owl actually increases the risk of cancer or whether their preference for the evening is symptom of another, unknown risk factor.

Cases from the BCAC had a 40 percent reduction among morning people and it was 48 percent in the U.K. Biobank.

Dr Richard Berks, from Breast Cancer Now, said: "These intriguing results add to the growing body of evidence that there is some overlap between the genetics of when we'd prefer to sleep and our breast cancer risk, but more research is required to unravel the specifics of this relationship".

"These are interesting findings that provide further evidence of how our body clock and our natural sleep preference is implicated in the onset of breast cancer", said breast surgeon Cliona Kirwan.

"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", Richmond said.

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

"We know that sleep is important generally for health", said Richmond.

"The statistical method used in this study, called Mendelian randomization, does not always allow causality to be inferred", said Dipender Gill, clinical research training fellow at Imperial College London.

"In terms of the implications of the research, it supports existing evidence that sleep patterns influence cancer risk, but it remains unclear how individual preferences for early or late rising interact with actual sleep behaviours", Moorthie wrote in an email. The Conference provides a platform for researchers, clinicians, people affected by cancer and industry representatives to come together to discuss, present and showcase high-quality research.

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

According to the World Health Organization (WHO), breast cancer is the most frequent cancer among cwomen, impacting 2.1 million women each year and causes the greatest number of cancer-related deaths.