Rates, Risk Factors and Outcomes of Complications After COVID-19 in Children

Mallika Rattanawijit1, Arisara Samutpong2, Nopporn Apiwattanakul3

  • 1From the Department of Pediatrics, Lampang Hospital, Lampang.

Insights

Long COVID in children is uncommon, affecting approximately 20.4% of cases. Risk factors include anosmia and a history of pneumonia, necessitating follow-up for persistent symptoms.

Area of Science:

  • Pediatric Infectious Diseases
  • Public Health Virology

Background:

  • Coronavirus disease 2019 (COVID-19) can cause significant complications in children, including multisystem inflammatory syndrome in children (MIS-C) and post-COVID-19 conditions (long COVID).
  • Understanding the incidence and risk factors for these conditions is crucial for pediatric healthcare.

Purpose of the Study:

  • To determine the rates, risk factors, and outcomes of MIS-C and long COVID in children diagnosed with COVID-19.
  • To compare these outcomes with children infected with other respiratory viruses.

Main Methods:

  • A combined retrospective and prospective cohort study enrolled 618 children (0-18 years) diagnosed with COVID-19 or another respiratory virus between October 2021 and April 2022.
  • Demographic, clinical data, and persisting symptoms at 1-12 months post-infection were recorded. MIS-C and long COVID were defined using CDC and WHO criteria.

Main Results:

  • The rate of persisting symptoms was 16.5% in COVID-19 patients versus 1.1% in other respiratory virus patients. The rate of MIS-C was 0.7%.
  • Long COVID rates were 20.4% (CDC) and 13.0% (WHO). Respiratory symptoms were most common. Risk factors included age 5-18, anosmia, prior pneumonia, and infection during Delta/Omicron waves.

Conclusions:

  • Long COVID is uncommon in children following COVID-19 infection.
  • Children experiencing anosmia or a history of pneumonia during COVID-19 warrant close follow-up for potential long COVID development.
Abstract

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