Monday, 19 November, 2018

Examine: Morning folks much less more likely to develop breast most cancers

BIG DAY OUT Marilyn Rice and Jo Maundrell BIG DAY OUT Marilyn Rice and Jo Maundrell. Robyn Hills
Melissa Porter | 09 November, 2018, 10:01

The morning people had a reduced risk of more than 40%, compared to the night owls.

Scientists also found a higher breast cancer risk in women who sleep longer than eight hours at night.

According to the statement, there are about 1.38 million new cases and 458,000 deaths from breast cancer each year, "as breast cancer is by far the most common cancer in women worldwide, both in the developed and developing countries".

But Dr Rebecca Richmond, a University of Bristol researcher who co-authored the study, says it remains unknown how this new finding could influence breast cancer prevention. The findings, which have not been peer-reviewed, were presented at the NCRI Cancer Conference in Glasgow, Scotland, from Sunday through Tuesday. There was less evidence of an association with either insomnia or sleep duration on risk of breast cancer in this study.

"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", he said.

"For example, the genetic determinants of sleep may also affect other neuronal mechanisms that affect breast cancer risk independently of sleep patterns". The use of Mendelian randomisation in this study enables the researchers to examine the causal effect on breast cancer of different sleep patterns by looking at the variations in particular genes already known to be associated with sleep characteristics.

Dr Emma Pennery, of the Breast Cancer Care charity, said: 'Changing your sleeping habits is not as easily done as other proven risk-reducing choices, as they're often part and parcel with jobs, parenting or other health conditions'.

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

The Medifem Multi-Specialist Hospital & Fertility Centre has rounded up a series of activities put together to mark Breast Cancer Awareness campaign in October.

Take our quiz to find out whether you are a morning type, or an evening owl.

So will a good night's sleep stop me getting cancer?

She is a research fellow in the Cancer Research U.K. Integrative Cancer Epidemiology Program at the University of Bristol. "I wouldn't support that women should get up earlier to reduce risk of breast cancer".

Similar studies have revealed a role for sleep preferences and mental health, including schizophrenia risk.

There are theories around the causes of sleep's effect on cancer, she said, such as the idea that artificial light at night leads to hormonal disruption.