(CNN) – A new study says women who work overnights could be at risk for some serious health problems.
Women who work the night shift regularly or even from time to time may be at a slightly greater risk for heart disease.
A study led by researchers at Brigham and women’s hospital in Boston found nurses who worked six to fourteen years of rotating shifts were 15 to 18 percent more likely to develop heart disease.
The study included the medical histories of more than 189-thousand women.
Rotating shifts were defined as working at least three nights per month – in addition to other times of the day.
Previous studies have linked overnight work to health issues. This study found the risk went down once the women stopped working night shifts. Researchers for some time have warned that night work can increase health risks.
The world health organization has gone as far as to call the night shift a probable carcinogen.