Researchers have been studying two groups of men in the United States of America (USA) with one primary aim – to discover what it takes to live well.

在美利坚合众国（美国），在如何才能生活得好这样一个基本目标下，研究人员一直对两组对象同时进行研究。

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There are no reliable global prevalence figures, but a 2005 study estimated a global incidence of 0.97 per 1000 live births based on research in the United States of America (USA).

目前尚无可靠的全球发病率数据，但2005年的一项研究显示，根据美国的研究，全球的发病率为每1000例活产0.97人。

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More seriously, obesity prevalence ranges from more than 30% in Fiji to a staggering 80% among women in American Samoa, a territory of the United States of America (USA).

更严重的是，肥胖症患病率普遍很高，斐济的这一患病率略低，亦在30%以上，而在属于美国领土的美属萨摩亚，妇女中肥胖症患病率为80%，高到惊人的程度。

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