BMJ Paediatrics Open (Aug 2022)

Risk factors for severe PCR-positive SARS-CoV-2 infection in hospitalised children

  • Jesse Papenburg,
  • Dara Petel,
  • Joan L Robinson,
  • Shaun K Morris,
  • Manish Sadarangani,
  • Karina A Top,
  • Ann Bayliss,
  • Tammie Dewan,
  • Ali Manafi,
  • Ashley Roberts,
  • Ari Bitnun,
  • Rosie Scuccimarri,
  • Helena Brenes-Chacon,
  • Alejandra Soriano-Fallas,
  • Rolando Ulloa-Gutierrez,
  • Jacqueline Wong,
  • Peter Gill,
  • Michelle Barton,
  • Jared Bullard,
  • Adriana Yock-Corrales,
  • Fatima Kakkar,
  • Tilmann Schober,
  • Chelsea Caya,
  • Jennifer Bowes,
  • Suzette Cooke,
  • Rachel Dwilow,
  • Tala El Tal,
  • Cheryl Foo,
  • Behzad Haghighi Aski,
  • Janell Lautermilch,
  • Marie-Astrid Lefebvre,
  • Kirk Leifso,
  • Nicole Le Saux,
  • Alison Lopez,
  • Joanna Merckx,
  • Alireza Nateghian,
  • Luc Panetta,
  • Dominique Piché,
  • Rupeena Purewal,
  • Lea Restivo,
  • Sarah Tehseen,
  • Isabelle Viel-Theriault,
  • Carmen Yea,
  • Ann Yeh

DOI
https://doi.org/10.1136/bmjpo-2022-001440
Journal volume & issue
Vol. 6, no. 1

Abstract

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Objective To identify risk factors for severe disease in children hospitalised for SARS-CoV-2 infection.Design Multicentre retrospective cohort study.Setting 18 hospitals in Canada, Iran and Costa Rica from 1 February 2020 to 31 May 2021.Patients Children<18 years of age hospitalised for symptomatic PCR-positive SARS-CoV-2 infection, including PCR-positive multisystem inflammatory syndrome in children (MIS-C).Main outcome measure Severity on the WHO COVID-19 Clinical Progression Scale was used for ordinal logistic regression analyses.Results We identified 403 hospitalisations. Median age was 3.78 years (IQR 0.53–10.77). At least one comorbidity was present in 46.4% (187/403) and multiple comorbidities in 18.6% (75/403). Eighty-one children (20.1%) met WHO criteria for PCR-positive MIS-C. Progression to WHO clinical scale score ≥6 occurred in 25.3% (102/403). In multivariable ordinal logistic regression analyses adjusted for age, chest imaging findings, laboratory-confirmed bacterial and/or viral coinfection, and MIS-C diagnosis, presence of a single (adjusted OR (aOR) 1.90, 95% CI 1.13 to 3.20) or multiple chronic comorbidities (aOR 2.12, 95% CI 1.19 to 3.79), obesity (aOR 3.42, 95% CI 1.76 to 6.66) and chromosomal disorders (aOR 4.47, 95% CI 1.25 to 16.01) were independent risk factors for severity. Age was not an independent risk factor, but different age-specific comorbidities were associated with more severe disease in age-stratified adjusted analyses: cardiac (aOR 2.90, 95% CI 1.11 to 7.56) and non-asthma pulmonary disorders (aOR 3.07, 95% CI 1.26 to 7.49) in children<12 years old and obesity (aOR 3.69, 1.45–9.40) in adolescents≥12 years old. Among infants<1 year old, neurological (aOR 10.72, 95% CI 1.01 to 113.35) and cardiac disorders (aOR 10.13, 95% CI 1.69 to 60.54) were independent predictors of severe disease.Conclusion We identified risk factors for disease severity among children hospitalised for PCR-positive SARS-CoV-2 infection. Comorbidities predisposing children to more severe disease may vary by age. These findings can potentially guide vaccination programmes and treatment approaches in children.