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Presented at the National Cancer Research Institute conference this week in Glasgow, Scotland, a study suggests that women who are older in the morning are less likely to develop bad cancer. Decryption.
We know it: there are those who " are more morning And those who " are no longer evening ". A distinction that depends on the biological clock of each one. The latter, according to a study by British researchers, has an impact on the risk of whether or not to develop bad cancer. Explanations.
40% to 48% less risk for early risers
Led by Dr. Rebecca Richmond of the University of Bristol (United Kingdom) with the participation of researchers from the Universities of Manchester and Exeter (United Kingdom) and some American and Norwegian scientists, the study badyzed the data from 409,166 participants to see if it existed a link between the biological clock and the development of bad cancer in women.
In order to determine whether the up early " and the " night birds Had the same risk, the team exploited the method called randomization of Mendel, which consists in " use genetic variants badociated with risk factors possible bad cancer, such as sleep characteristics, to see if they could contribute to causing this disease ", Explains it in La Dépêche. "We took into account the habits of these people: if they get up sooner or later, how much of hours they sleepif they suffer insomnia "explained Dr. Rebecca Richmond.
The results showed that a period of 8 years, 2 "night birds" (who do not get up early, note) out of 100 developed this pathology, against only 1 early bird in 100. The " up early " show 40 to 48% less risk to develop bad cancer as the "late risers"
The importance of the right amount of sleep
Moreover, if we already knew certain wrongdoing related to sleeping too much, the study also showed that too much sleep would also be harmful in this precise case. The risk to develop bad cancer increases by 20% in women who exceed 7 to 8 hours of sleep Recommended.
"These results are potentially very important because the sleep is ubiquitous and can be easily modified. Previous studies have looked at the impact of work in staggered hours, but this research shows that there may be a risk factor for all women " the scientist told the BBC.
So is it enough to change your sleep pattern to minimize your risk of developing bad cancer, which is the 1st cause of death by cancer in women? According to Dr. Richmond, he is still too early to give this advice Women's. "We still have to understand what makes a person" at night "more risky than a person in the morning. We have need to badyze this link ".
In France, 1 woman out of 8 is concerned with bad cancer.
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