Comparison of the fixed ratio and the Z-score of FEV₁/FVC in the elderly population: a long-term mortality analysis from the Third National Health and Nutritional Examination Survey

Dong Kyu Oh1 Department of Pulmonary and Critical Care Medicine, Clinical Research Center for Chronic Obstructive Airway Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea

Seunghee Baek2 Department of Clinical Epidemiology and Biostatistics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea

Sei Won Lee1 Department of Pulmonary and Critical Care Medicine, Clinical Research Center for Chronic Obstructive Airway Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea

Jae Seung Lee1 Department of Pulmonary and Critical Care Medicine, Clinical Research Center for Chronic Obstructive Airway Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea

Sang-Do Lee1 Department of Pulmonary and Critical Care Medicine, Clinical Research Center for Chronic Obstructive Airway Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea

Yeon-Mok Oh1 Department of Pulmonary and Critical Care Medicine, Clinical Research Center for Chronic Obstructive Airway Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South KoreaCorrespondence[email protected]

Comparison of the fixed ratio and the Z-score of FEV₁/FVC in the elderly population: a long-term mortality analysis from the Third National Health and Nutritional Examination Survey

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Comparison of the fixed ratio and the Z-score of FEV1/FVC in the elderly population: a long-term mortality analysis from the Third National Health and Nutritional Examination Survey

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Comparison of the fixed ratio and the Z-score of FEV₁/FVC in the elderly population: a long-term mortality analysis from the Third National Health and Nutritional Examination Survey