BACKGROUND AND OBJECTIVE: Few studies have examined the natural course of early @entity1030 . The aim of this study was to observe the natural course of early @entity1030 @entity1 . We also aimed to analyze medical utilization and costs for early @entity1030 during a 6-year period. METHODS: @entity1 with early @entity1030 were selected from Korean National Health and Nutrition Examination Survey (KNHANES) data. We linked the KNHANES data of @entity1 with early @entity1030 to National Health Insurance data. RESULTS: A total of 2,397 @entity1 were enrolled between 2007 and 2012. The mean forced expiratory volume in 1 second (FEV1) was 78.6%, and the EuroQol five dimensions questionnaire (EQ-5D) index value was 0.9. In total, 110 @entity1 utilized health care for @entity1030 in 2007, and this number increased to 179 in 2012. The total mean number of days used per @entity1 increased from 4.9 in 2007 to 7.8 in 2012. The total medical cost per @entity1 also increased from 248.8 US dollar (USD) in 2007 to 780.6 USD in 2013. A multiple linear regression revealed that age, lower body mass index, lower FEV1 (%), and lower EQ-5D score were significantly associated with medical costs. CONCLUSION: Even in early @entity1030 @entity1 , some of them eventually progressed and utilized health care for @entity1030 .

Natural course of early XXXX .

@entity1 :: ('9606', 'Species') :: ['patients', 'person', 'Patients'] @entity1030 :: ('MESH:D029424', 'Disease') :: ['COPD']
@entity1030 :: (MESH:D029424,Disease) :: ['COPD']
