Table 1. Summary of included nationwide studies on Kawasaki disease in Korea (2014–2025)

	Year	Database	Study design	Topic	Diagnosis
Kim et al. [1]	2014	KSKD survey	Cohort study	Epidemiology	Clinically diagnosed1)
Kim et al. [3]	2014	KSKD survey	Ecological time-series study	Epidemiology	Clinically diagnosed
Jang et al. [4]	2015	KSKD survey	Cohort study	Risk factor analysis	Clinically diagnosed
Lee et al. [5]	2015	KKDGC	GWAS, case-control study	Gene study	Clinically diagnosed
Kim et al. [6]	2017	KSKD survey	Cohort study	Epidemiology	Clinically diagnosed
Kim et al. [7]	2018	KSKD survey	Cohort study	Risk factor analysis	Clinically diagnosed
Hur et al. [8]	2019	KSKD survey	Cohort study	Treatment outcome	Clinically diagnosed
Kim et al. [9]	2020	KSKD survey	Cohort study	Epidemiology	Clinically diagnosed
Kim et al. [10]	2021	KSKD survey	Cohort study	Diagnostic evaluation	Clinically diagnosed
An et al. [11]	2021	KSKD survey	Cohort study	Risk factor analysis	Clinically diagnosed
Kang et al. [12]	2021	NHIS	Ecological time-series study	Epidemiology	ICD-10 code-based
Choe et al. [13]	2021	HIRA	Ecological time-series study	Epidemiology	ICD-10 code-based
Kim et al. [14]	2021	KKDGC	WES, case-control study	Gene study	Clinically diagnosed
Kim et al. [15]	2021	KKDGC	GWAS, case-control study	Gene study	Clinically diagnosed
Hong et al. [16]	2021	Multicenter data	Observation study	Epidemiology	ICD-10 code-based
Kwak et al. [17]	2022	NHIS	Cohort study, PSM	Risk factor analysis	ICD-10 code-based
Na et al. [18]	2022	NHIS	Cohort study, PSM	Risk factor analysis	ICD-10 code-based
Kim et al. [19]	2022	NHIS	Ecological time-series study	Epidemiology	ICD-10 code-based
Kang et al. [20]	2022	NHIS	Ecological time-series study	Epidemiology	ICD-10 code-based
Kwon et al. [21]	2022	HIRA	Case-crossover study	Risk factor analysis	ICD-10 code-based
Jeong et al. [22]	2022	HIRA	Ecological time-series study	Epidemiology	ICD-10 code-based
Kim et al. [23]	2022	Multicenter data	Observation study	Epidemiology	Clinically diagnosed
Cha et al. [24]	2023	NHIS	Cohort study	Risk factor analysis	ICD-10 code-based
Kim et al. [25]	2023	HIRA	Cohort study, PSM	Risk factor analysis	ICD-10 code-based
Shin et al. [26]	2023	HIRA	Cohort study, PSM	Risk factor analysis	ICD-10 code-based
Kim et al. [27]	2024	NHIS	Cohort study, longitudinal	Risk factor analysis	ICD-10 code-based
Oh et al. [28]	2024	HIRA	Cohort study, PSM	Epidemiology	ICD-10 code-based
Kim et al. [29]	2024	HIRA	Cohort study, PSM	Comorbidity analysis	ICD-10 code-based
Yu et al. [30]	2024	Multicenter data	Observation study	Diagnostic evaluation	Clinically diagnosed
Cheon et al. [31]	2025	KSKD survey	Cohort study	Risk factor analysis	Clinically diagnosed
Kwak et al. [32]	2025	NHIS	Cohort study	Comorbidity analysis	ICD-10 code-based
Lee et al. [33]	2025	NHIS	Cohort study, PSM	Comorbidity analysis	ICD-10 code-based
Lee et al. [34]	2025	HIRA	Cohort study	Treatment outcome	ICD-10 code-based

Diagnosis confirmed by pediatric Kawasaki disease specialists.
KSKD: Korea Society of Kawasaki Disease; KKDGC: Korean Kawasaki Disease Genetics Consortium; GWAS: genome-wide association study; NHIS: National Health Insurance Service; HIRA: Health Insurance Review of Assessment Service; ICD: international classification of diseases; WES, whole exome sequencing; PSM: propensity score matching.