A long-term study of 6,553 Japanese people has found that job stress can significantly increase the risk of stroke in men. The participants were first interviewed between 1992 and 1995 and were then monitored over the next 11 years. Stress is thought to be caused by a combination of high demands placed upon people and their having low control over their work. The participants were divided into four groups: low demands and high control (low strain), high demands and high control (active), low demands and low control (passive) and high demands and low control (high strain). Men with high-strain jobs had more than twice the risk of men with low-strain jobs. Women in high-strain jobs had a higher risk than those in low-strain jobs although this difference was not statistically significant.
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