COVID-19 pandemic and enrollment of critically Ill children in randomized clinical trials

Sarah B Kandil1, David Panisello-Manterola2, Madhuradhar Chegondi3

  • 1Department of Pediatrics, Section of Critical Care Medicine, Yale University, School of Medicine, New Haven, CT, United States.

Frontiers in Pediatrics
|December 11, 2025
PubMed

Insights

The COVID-19 pandemic lowered enrollment for critically ill children in clinical trials. Parental refusal increased, linked to fewer research staff, impacting trial participation.

Area of Science:

  • Pediatric Critical Care Medicine
  • Clinical Trial Management
  • Epidemiology

Background:

  • The COVID-19 pandemic significantly impacted healthcare systems globally.
  • Enrollment in pediatric randomized clinical trials (RCTs) may have been affected.
  • Parental consent is crucial for pediatric RCT participation.

Purpose of the Study:

  • To assess the association between the COVID-19 pandemic and enrollment rates in pediatric RCTs.
  • To investigate changes in reasons for non-enrollment, particularly parental refusal.

Main Methods:

  • A cross-sectional analysis of two multicenter RCTs involving critically ill children was performed.
  • Enrollment data from pre-COVID-19 (November 2017-August 2019) and post-COVID-19 (May 2022-August 2024) periods were compared.
  • Reasons for non-enrollment were analyzed for 622 eligible children.

Main Results:

  • Enrollment rates decreased significantly from 30.9% pre-COVID-19 to 18.2% post-COVID-19 (P=0.001).
  • Parental unavailability decreased, but research staff unavailability increased post-pandemic.
  • Despite similar overall parental refusal rates, enrollment failure due to parental refusal rose post-COVID-19 (64.1% vs. 46.3%, P=0.003).

Conclusions:

  • The COVID-19 pandemic is linked to reduced enrollment in pediatric critical care RCTs.
  • Increased parental refusal post-pandemic is confounded by decreased research staff availability.
  • Further research is needed to understand science denialism's role and improve RCT enrollment strategies.
Abstract

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