Night Shifts and Unhealthy Lifestyle Combine to Increase Risk of Diabetes for WOMEN

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Night Shifts and Unhealthy Lifestyle Combine to Increase Risk of Diabetes


Working night shifts and having an unhealthy lifestyle appear to have an additive effect on the likelihood of developing type 2 diabetes, and women with both have a greater risk than simply adding the impact of either factor alone, suggests a pooled analysis of two major studies.
Zhilei Shan, PhD, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China, and Harvard T.H. Chan School of Public Health, Boston, Massachusetts, and colleagues combined data on more than 140,000 nurses who took part in two long-term prospective health studies.
The research, which was published online on November 21 in BMJ, indicates that every 5 years of rotating night shift work increased the risk of type 2 diabetes by around 30%.
And having a combination of several unhealthy lifestyle factors, such as being a smoker or having a high body mass index (BMI) or poor diet, more than doubled the risk of developing the disease.
However, women with both an unhealthy lifestyle and more than 5 years of rotating night shift work were 2.83 times more likely than women without these factors to develop type 2 diabetes, with the two factors together accounting for 11% of additional risk.
The researchers say their findings “suggest that most cases of type 2 diabetes could be prevented by adherence to a healthy lifestyle, and the benefits would be larger in rotating night shift workers.”

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