Retired night shift workers have higher risk of diabetes, study finds

October 17th, 2013 in Diabetes /

(Medical Xpress)—People who regularly work night shifts in their lifetimes are twice as likely to have diabetes, even if they have retired and returned to a normal, daytime schedule, according to a new study released today in the Journal of Biological Rhythms.

The study complements previous international research that found night shift work is associated with a decrease in metabolic health, impaired glucose metabolism, increased (BMI), and impaired insulin resistance. In the U.S., a recent Nurses' Health Study showed a night shift work-related increase in BMI and diabetes risk in working female nurses. The Pitt study is the first to examine the increased risk of diabetes in a large, U.S. sample of retired men and women with varying pre-retirement occupations who are no longer subject to the stresses of night shift work.

"The results are worrisome, given the current epidemic of diabetes and obesity in the U.S.," said Timothy H. Monk, Ph.D., D.Sc., the study's lead author and professor of psychiatry at the University of Pittsburgh School of Medicine. "Increasingly, scientific study has confirmed the importance of regular sleep patterns and sufficient sleep in maintaining good health."

For this study, researchers interviewed more than 1,000 retired night over 65-years-old living in western Pennsylvania, and divided the respondents into five groups: those who worked for 0 years, 1 to 7 years, 8 to 14 years, 15 to 20 years and more than 20 years.

The results showed:

"We ought to recognize that there is a health cost to society of exposing large numbers of people to night shift work. Steps should be taken both to encourage day work as an alternative wherever possible, and also to provide education and support for employees who are in occupations that, by their very nature, require work at night." added Monk.

The authors also recommended that intensive educational campaigns be launched to encourage to adopt behavioral strategies regarding diet, exercise and circadian adjustment because of their increased vulnerability to metabolic health problems.

Provided by University of Pittsburgh

"Retired night shift workers have higher risk of diabetes, study finds." October 17th, 2013. http://medicalxpress.com/news/2013-10-night-shift-workers-higher-diabetes.html