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. 2021 Jun 25;11(1):13309.
doi: 10.1038/s41598-021-92669-z.

Exposures associated with the onset of Kawasaki disease in infancy from the Japan Environment and Children's Study

Sayaka Fukuda  1   2 , Shiro Tanaka  3 , Chihiro Kawakami  1 , Tohru Kobayashi  4 , Shuichi Ito  5 ; Japan Environment and Children’s Study (JECS) Group
Collaborators, Affiliations

Exposures associated with the onset of Kawasaki disease in infancy from the Japan Environment and Children's Study

Sayaka Fukuda et al. Sci Rep. .

Abstract

Kawasaki disease (KD) is an acute systemic vasculitis that mainly affects infants and young children. The etiology of KD has been discussed for several decades; however, no reproducible risk factors have yet been proven. We used the Japan Environment and Children's Study data to explore the association between the causal effects of exposure during the fetal and neonatal periods and KD onset. The Japan Environment and Children's Study, a nationwide birth cohort study, has followed approximately 100,000 children since 2011. We obtained data on exposures and outcomes from the first trimester to 12 months after birth. Finally, we included 90,486 children who were followed for 12 months. Among them, 343 children developed KD. Multivariate logistic regression revealed that insufficient intake of folic acid during pregnancy (odds ratio [OR], 1.37; 95% CI 1.08-1.74), maternal thyroid disease during pregnancy (OR, 2.03; 95% CI 1.04-3.94), and presence of siblings (OR, 1.33; 95% CI 1.06-1.67) were associated with KD onset in infancy. In this study, we identified three exposures as risk factors for KD. Further well-designed studies are needed to confirm a causal relationship between these exposures and KD onset.

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Conflict of interest statement

The authors declare no competing interests.

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