In the year 2007, it was claimed by one of the World Health Organization Committee that probably there were some links that exist between breast cancer and night shifts. Women who work in different organizations at night were assumed to have high risk of cancer.
But this claim has been disputed and confirmed unfounded. A new research was done by United Kingdom Cancer experts who collected and analyzed data from about 1.4 million numbers of women. The researchers concluded that there is no such evidence.
According to the Cancer Research UK (CRUK), there is high hope that the findings from the research would restore reassurance among women and they would continue with their night shift work without any worry.
In the same year 2007, a ruling was made by the International Agency for Research on Cancer due to the disruption of work to the body clock.
By the time of the ruling, there existed very few or limited evidence concerning breast cancer and its risk in human and the classification was basically on a combination on animals and lab studies.
The new research is available in Journal of the National Cancer Institute where it is published.
By getting funds and support from the UK Health and Safety Executive together with Cancer Research UK and the UK Medical Research Council, it took a look and analyzed data collected from different studies, 10 in number, from Both USA, Sweden, Netherland, China and UK.
Taking comparison between those women who had never got assigned to work night shifts and those who had carried out some task in night shifts even for about or between 20-to-30 years, they had no any increase in terms of the risks caused by breast cancer.
The findings by the researchers have it that the incidence of breast cancer was essentially the same in women regardless of one working at night shift for many decades or working only during the day time hours.
According to Dr. Ruth Travis, a CRUK-funded scientist, the leader of the research based in the University of Oxford, she said: “We found that women who had worked night shifts, including long-term night shifts, were not more likely to develop breast cancer, either in the three new UK studies or when we combined results from all 10 studies that had published relevant data.”