Why do women live an average of nine years longer than men? That’s the question Professor Laura Sandman set out to find out among 4,000 people living in Los Angeles area.
Sandman, now working at the University of California at Berkely, found the risk factors or bad habits thought to lead to the early death were far more prevalent among women and men. High risk factors for women included smoking, physical inactivity, and few contacts with friends or relatives. Much the same factors thought of for men were drinking, cigarette smoking and not being married.
The conclusion is that women are indeed more biologically fit than men simply as a result of hormonal(荷尔蒙)differences. Says Sandman, “Women have lower death rates(比率)in almost every country, at almost every age, and for most causes of death.”

为什么女人平均寿命比男人多九年？这就是Laura Sandman制定的在4,000生活在洛杉机地区的人当中要寻求答案的问题。

萨德曼---现在就职于Berkely的加利福尼亚大学---发现导致过早死亡的风险因素或者不良的生活习惯在男人和女人中间非常盛行。导致女人过早死亡的风险因素包括抽烟，身体停滞不运动，以及极少和朋友或亲属接触联系等原因。导致男人过早死亡的原因还包括：饮酒，抽烟，及独身。


最后的结论是：由于荷尔蒙的差异使得女人在生理上确实比男人更适应。萨德曼先生说，“女人较低的死亡率在几乎每个国家，几乎任何年龄，以及对导致死亡的大多数原因都存在。”