1. Statistics Korea. The elderly statistics in 2023 [Internet]. Daejeon. Statistics Korea. 2023. cited 2023 Dec 18. Available from: https://kostat.go.kr/board.es?mid=a10301010000&bid=10820&list_no=427252&act=view&mainXml=Y
2. Korea Disease Control and Prevention Agency. Statistical tables [Internet]. Cheongju. Korea Disease Control and Prevention Agency. 2021. cited 2023 Dec 18. Available from: https://knhanes.kdca.go.kr/knhanes/sub04/sub04_04_01.do