the women who loves rise early are less likely to developing breast cancer, suggests a new study. The British researchers analyzed two databases that included more than 409,000 women to investigate the relationship between sleep patterns and the risk of breast cancer.
Compared to nightworms, women like they got up early they had a 40 percent lower risk of breast cancer, found the study.
The data also showed that women who slept longer than the seven to eight hours recommended per night had a 20 percent higher risk of breast cancer for every additional hour as they slept.
"We would like to do more work to investigate the mechanisms underlying these results, as they estimated the estimates based on questions about preferences in the morning or evenings, rather than if people actually stood earlier." Or later, "says Rebecca Richmond , a researcher in the Comprehensive Cancer Epidemiology Program at Cancer Research UK, at the University of Bristol.
"In other words, habits do not change the risk of breast cancer, it may be a more complicated issue," he said.
"The result of a protective effect of morning preference on the risk of breast cancer in our study, however, is consistent with previous research …", noted Richmond.
"We also found some evidence of causal relationship with longer sleep duration and sleep fragmentation on breast cancer," he added.
The study was presented Tuesday at the annual cancer conference from the National Cancer Research Institute (NCRI) in Britain, Glasgow, Scotland.
The study did not show a causal link between sleep patterns and the risk of breast cancer.
"They are interesting findings that provide more evidence of how our body's clock and our natural sleep preferences are involved at the beginning of breast cancer"Cliona Clare Kirwan, member of the NCRI Breast Clinical Study Group, did not attend Kirwan in the survey.
"We already know that night shift work is associated with poor mental and physical health, and this study offers more evidence that disturbing sleep patterns can play a role in the development of cancer," says Kirwan in a statement. pressure of the meeting.
The surveys presented at the meetings are considered provisional until published in a peer-reviewed journal.