Kawasaki Disease Before and During the COVID-19 Pandemic: A Nationwide Population-based Study in the United States

Author:

Sakai-Bizmark Rie12ORCID,Estevez Dennys1,Wu Frank1,Marr Emily H.1,BenDavid Eyal2,Mena Laurie A.1,Chang Ruey-Kang R.12

Affiliation:

1. The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, California

2. Department of Pediatrics, Harbor-UCLA Medical Center and David Geffen School of Medicine at UCLA, Torrance, California.

Abstract

Background: A decrease in the incidence of Kawasaki disease during the COVID-19 pandemic has been reported globally. Yet, previous US studies utilized patient populations of limited size and geographic scope, leaving a knowledge gap regarding the national trend. Employing a large sample size will increase the generalizability of the results and allow for more detailed analyses. Methods: The observational study using the 2016–2020 National (Nationwide) Inpatient Sample examined changes in the Kawasaki disease hospitalization rate in pediatric patients during the COVID-19 pandemic. Sensitivity analyses examined hospitalizations between October and December each year, as the code for multisystem inflammatory syndrome in children was implemented in October 2020. Results: In total, 24,505 hospitalizations with Kawasaki disease diagnoses were examined. Hospitalization rates were 65.1 and 53.8 per 1,000,000 pediatric population during the prepandemic and pandemic periods, respectively. Sensitivity analyses showed an overall decrease of 36.1%, with larger decreases for patients 1–4 years old (49.6%), males (40.0%), Asians or Pacific Islanders (57.9%) and patients in the South (47.5%), compared with their counterparts. Associations of the pandemic period with longer lengths of stay and higher daily costs were detected (adjusted mean ratio 1.11; P < 0.01 for length of stay, and adjusted mean ratio 1.33, P < 0.01 for costs). Conclusions: A decrease in the incidence of Kawasaki disease during the COVID-19 pandemic was observed nationwide in the United States. Contrary to a report from Japan, we did not observe a relationship between population density and a decrease in Kawasaki disease hospitalization. More detailed analyses in targeted geographical areas may provide further insights.

Funder

National Institutes of Health (NIH) Research Scientist Development Award

Publisher

Ovid Technologies (Wolters Kluwer Health)

Subject

Infectious Diseases,Microbiology (medical),Pediatrics, Perinatology and Child Health

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