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目的 Earlydiagnosisofchronicobstructivepulmonarydisease(COPD)isoftenignoredduetolimitedrecognitionandlimitedaccessofpulmonaryfunctiontestincommunityhospital.OurhypothesiswasthatlungfunctiondeclinemightbedifferentinmildCOPDorCOPDhigh-riskpopulationwithoutintervention,andtofindouttheclinicalprofileoflungfunctiondeclinetogetherwithlaboratoryexaminationmayprovideanewscreeningapproachforearlyinterventionofCOPD.