除了吸烟、体重过重和胆固醇高等危险因素外，医生们发现，每天加班三四个小时的人罹患心脏病的几率比不加班的人高出60%。
Those who worked overtime tended to be slightly younger than the non-overtime group, were likelier to be men rather than women and be in a higher occupational grade.
加班的人往往比不加班的人稍微年轻，多数为男性，而且职位较高。
The investigators say the link between cardiac problems and overtime seems clear but the cause is less so, given the complexities of heart disease and relationships in the workplace.
调查人员表示，心脏问题与加班加点之间的关系看似十分明显，但鉴于心脏病和职场关系的复杂性，原因没有看起来那么清楚。
For instance, working overtime could affect metabolism or mask depression, anxiety and sleeplessness, they caution.
他告诫说，比如，超时工作可能影响新陈代谢，引发抑郁、焦虑或失眠。
In addition, people who like their job and have greater latitude in work decisions tend to work longer hours just for the pleasure, and may have a lower rate of CHD.
然而，喜欢自己的工作且工作自由度较大的人常常只是出于乐趣而工作更长时间，他们罹患冠心病的几率较低。