Key points from article :
Study into work stress on health of people with existing medical conditions.
Men were 68% more likely to die during study if jobs were demanding with little control.
Feeling overwhelmed at work is nearly as harmful as smoking.
Neither job strain nor effort-reward imbalance impacted death rates of women.
Tracked more than 100,000 people in Finland, France, Sweden and the UK.
The study was published in The Lancet Diabetes & Endocrinology journal.
