Researchers led by Dan Hackam, associate professor at Western University, London Ontario in Canada, analyzed data from more than 34 different studies involving over 2 million workers and identified more than 17,359 coronary problems.
The researchers found that the risk of heart attacks increased by 23 percent while there was a 24 percent increased risk of coronary event among people who worked on night shifts.
"Night shift workers are up all the time and they don't have a defined rest period. They are in a state of perpetual nervous system activation which is bad for things like obesity and cholesterol", Hackam said. The study has been published in the recent issues of British Medical Journal.