Participants - who ranged in age from 25-65 - worked in a variety of fields, including finance, health care, manufacturing and insurance. By the time the study concluded in 2008, 58 participants had died.
The study found that those who died were significantly more likely than those who survived to report having a hostile work environment.
People who reported having little or no social support from their co-workers were 2.4 times more likely to die during the course of the study than those who said they had close, supportive bonds with their workmates - although those with horrible bosses were no more likely to die than others.
Men who said they had more autonomy at work had a lower risk of dying during the study period than men with less freedom, but women who reported having power at work had a 70 per cent increased risk of death.