A study published in JAMA shows a substantial difference in mortality rates from chronic respiratory diseases between counties in the USA—with some drastic differences even between counties located in the same state. According to Dr David M Mannino (University of Kentucky College of Public Health, Lexington, KY, USA), who wrote an editorial to accompany the JAMA study, there has always been a sense that chronic respiratory disease could vary radically from one county to another, but this study quantified that disparity for the first time.

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在美国，慢性呼吸道疾病造成的死亡率差异很大

在JAMA上发表的一项研究表明，美国各县之间因慢性呼吸道疾病造成的死亡率差异很大，即使位于同一州的各县之间也存在巨大差异。根据美国肯塔基州列克星敦市肯塔基大学公共卫生学院的David M Mannino博士的说法，他在JAMA研究的同时发表社论，一直认为，慢性呼吸道疾病可能在一个州与另一个州之间存在根本性的差异。 ，但这项研究首次量化了这种差异。