Psychiatric hospitalization in Korea, 2011–2020: the impact of the Mental Health Act revision of 2017 in consideration of the COVID-19 pandemic

OBJECTIVE: This study was performed to examine the changes in psychiatric hospitalization in Korea after the mental health law revision of 2017 with consideration of the COVID-19 pandemic. METHODS: The data were obtained from National Health Insurance and Medical Aid statistical yearbooks of 2011–2020. The changes in the inpatient and outpatient utilization for schizophrenia from 2011 to 2020 were compared with those for other psychiatric disorders and the general population. With difference-in-differences analysis, the changes in utilization of inpatient and outpatient care for schizophrenia after the law revision of 2017 were analyzed with two comparison groups. RESULTS: While the number of inpatients and inpatient days for schizophrenia decreased between 2017 and 2019, the number of outpatients and outpatient visits for schizophrenia increased during the period. Inpatient care utilization in two comparison groups increased during the same period. Whereas the COVID-19 pandemic of 2020 led to a general decrease in health care use among the population including inpatient care for schizophrenia, the number of outpatients for schizophrenia increased slightly after the pandemic. Difference-in-differences analysis showed that the law revision was associated with the decrease in the use of inpatient care for schizophrenia after adjustment for the effect of the COVID-19 pandemic. CONCLUSIONS: The mental health law revision in Korea led to a significant decrease in hospitalization for schizophrenia. However, the limited effect of revision on the Medical Aid beneficiaries suggests that the revision was not followed by the provision of the proper alternatives which can replace hospitalization of the most vulnerable population.