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据近期出版的《美国医学会杂志》上的一篇报道称,美国自1991年以来的肥胖者人数增加了50％。亚特兰大疾病控制和预防中心(CDC)的主任Jeffery Kop-lan认为,肥胖已成为一种具有迅速而分散传播特征的流行性疾病。同期的一篇社论指出,约半数以上的美国人体重超重。研究人员通过电话采访调查搜集了1991～1998年间的数据资料。每年约有
According to a report published recently in the Journal of the American Medical Association, the number of obese people in the United States since 1991 has increased by 50%. According to Jeffery Kop-lan, director of the Centers for Disease Control and Prevention (CDC) in Atlanta, obesity has become an epidemic characterized by rapid and diffuse transmission. An editorial in the same period pointed out that about half of Americans are overweight. Researchers collected data from 1991 to 1998 through telephone interviews. About every year