Cox regression of overall mortality in patients starting long-term oxygen therapy, 1992–2008.
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Definition of abbreviations: FEV1 = forced expiratory volume in one second; PaO2 air = arterial blood gas tension of oxygen while breathing ambient air. *Never smoking is used as reference category. †Charlson score 0 is used as reference category.
创建时间：
2012-04-26
