title: Normal values for the ratio of one-second forced expiratory volume to forced vital capacity.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000402:Airway Obstruction / Q000503:physiopathology; D001827:Body Height; D005260:Female; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D012044:Regression Analysis; D012737:Sex Factors; D012907:Smoking; D013147:Spirometry / Q000592:standards; D014797:Vital Capacity