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Purposes: The purpose of this study was to analyze the trends of hospitalization and emergency room visits of asthma patients over the three years in 25 districts of Seoul. And analyzed the relationship between preventable hospital service uses and number of clinics for asthma patients. Methods: Data was collected from a customized database of the NHI(National Health Insurance) for 2016 to 2018. The number of clinics means Internal Medicine, Pediatrics, Ear-Nose-Throat, and Family Medicine clinics. The hospital service means the number of adults admission for asthma and the number of total asthma emergency visits. This study used kappa analysis to assess the agreements of indicators between years, and structural equation modeling analysis was applied to analyze the relationship. Findings: The kappa value of the number of adults admission for asthma was compared between 2016 and 2017(kappa score=0.68), and was lowered when compared between 2016 and 2018(kappa score=0.26). And the value of kappa in the number of total asthma emergency visits due to asthma between 2016 and 2017(kappa score=0.51) was lower than that of between 2016 and 2018(kappa score=0.60). And the results showed that the number of clinics significantly negatively related to the uses of hospital services in asthmatic patients(β=-0.5, p=0.005). Practical Implication: This research could provide policy implications for strengthening primary care services that can contribute to the reduction of preventable hospital services.
