Study has exposed that women who wake up early in the morning may have a reduced risk of developing breast cancer.
This study was conducted at the University of Bristol, United Kingdom.
According to the British Broadcasting Corporation, the experts said the study, presented at the NCRI Cancer Conference in Glasgow, added to a growing understanding of the importance of sleep in living a healthy lifestyle.
Dr Rebecca Richmond, a research fellow in the Cancer Research UK Integrative Cancer Epidemiology Programme, who led the research, revealed that one in 100 women, who considered themselves morning people, developed breast cancer, compared with two in every 100 women who called themselves evening people.
Richmond and her research team also examined genetic variants that determine whether someone is a ‘morning’ or ‘night’ person or not in more than 220,000 women to find out if these could help provide a causal link to breast cancer.
The study revealed that people whose genes made them more likely to be early risers were less likely to develop breast cancer by as much as 48 per cent, as shown from the 220,000 participants in the study.
The second analysis used self-reported data on sleep from 180,000 participants and showed a similar trend of early rising women having a 40 per cent lower risk of breast cancer. Richmond stated that the variation was due to technical differences.
The study authors pointed out that many factors were involved in a person developing breast cancer and that these numbers were not an absolute risk.
Richmond said, “Sleep is likely to be an important risk factor for breast cancer, but it isn’t as large as other well-established risk factors like BMI or alcohol.”