After accounting for risk factors such as smoking, overweight and high cholesterol, doctors found that working between three and four hours of overtime each day was associated with a 60 percent greater risk compared to those who did no overtime.

　　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%。