Breast cancer: the early risers would be less at risk

According to the findings of a new scientific study, women are more in the morning than in the evening they are less likely to suffer from breast cancer than others.

    Breast cancer: less risk for the early risers?

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Sleepers and early risers would not have the same risk of breast cancer. This is certainly what researchers from the University of Bristol (United Kingdom) have discovered, after conducting a scientific study of all that is most serious.

Presented at a conference of the British Institute Against Cancer (NCRI) in Glasgow, early women would have a Breast cancer risk reduced by 40% compared to women called "night owls", who go to bed late and get up later, or are more active in the evening than in the morning.

The study suggests that our internal clock, or circadian rhythm, can play a role in our chances of having breast cancer.

To reach this conclusion, the scientists used a method called "Mendelian Randomization"It is about using genetic variants related to potential risk factors, in this case the circadian rhythm, to determine whether or not there is a correlation between it and a disease, in this case breast cancer. more reliable than other methods of observation, since it is based on genetic variants and avoids distortions of environmental factors.

The study was conducted on data from 180,215 women in the British Biobank project and 228,951 women who participated in a breast cancer study across the entire genome conducted by the Breast Cancer Association (BCAC) consortium. 314 variants related to circadian rhythm were analyzed.

The intersection of data shows that scientists were able to observe a 40% lower risk of breast cancer for early birds than the risk of women late at night. It was also found that women who sleep more than 7 to 8 hours recommended an increase in risk of 20% per additional hour contract breast cancer.

A discovery that goes in the direction of observations related to night work

The data analysis concluded that about one in 100 "early morning" women will develop breast cancer, compared to two in 100 women in the evening group.

"We would like to continue the work to study the mechanisms behind these results, since the estimates obtained are based on questions related to morning or evening preferences and not to the question of whether people get up sooner or later at the end of the day."Said Rebecca Richmond, principal author of the study."In other words, changing your habits can not change your breast cancer risk, it may be more complex than that. However, the results of our study […] in line with the previous research that highlights the role played by night job isexposure to night light as to risk factors for breast cancer", Concluded the researcher.

Source: University of Bristol

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