According to a Canadian medical review, as reported by cbc.ca, someone who works on the night shift has a greater risk of breast cancer those who than those who don’t. The review doesn’t specifically aim for women because actually men share the same threat.
Now, if the statement above is correct, then how can working after sunset increases the risk of breast cancer?
The conclusion had been presented as evidence in a previous study conducted by The World Health Organization's International Agency for Research on Cancer (IARC). The research revealed that there is an actual connection between the work hour and health condition, known as carcinogenic (causing toxic or poison).
Face More Risk of Breast Cancer
However, the lack of evidence provided in the report as well as the limited sorts of respondents - the study only examined nurses who work on night shift – had encouraged Prof. Kristan Aronson from Queen's University in Kingston to devise a new study.
Prof. Kristan Aronson decided to expand the scope of respondents and investigate 1100 women with breast cancer diagnosis and 1100 women with no diagnosis of breast cancer. Although his aim focuses on the correlation between night shift and the risk of breast cancer, Prof. Kristan also included other factors such as reproductive patterns, lifestyle and body mass of each respondent.
A hypothesis can finally be concluded from the study by Aronson. The conclusion states that a woman who works at night and spent his days sleeping or outside activity had a greater risk of breast cancer. That's because the lack of production of the hormone melatonin - the hormone anti cancer - due to lack of sun exposure that he got.
Eventually, a hypothesis is drawn from the research, suggesting that a woman who works at night and sleeps or lacking of outside activities during the day pose greater chance of breast cancer. That's because the lack of the hormone melatonin - the hormone anti cancer - produced by the body due to lack of sun exposure that she gets.