SARS-CoV-2 infection increases risk of acute kidney injury in a bimodal age distribution

SCCM Discovery VIRUS Investigators Group, Catherine A. St. Hill, David M. Tierney

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


BACKGROUND: Hospitalized patients with SARS-CoV2 develop acute kidney injury (AKI) frequently, yet gaps remain in understanding why adults seem to have higher rates compared to children. Our objectives were to evaluate the epidemiology of SARS-CoV2-related AKI across the age spectrum and determine if known risk factors such as illness severity contribute to its pattern. METHODS: Secondary analysis of ongoing prospective international cohort registry. AKI was defined by KDIGO-creatinine only criteria. Log-linear, logistic and generalized estimating equations assessed odds ratios (OR), risk differences (RD), and 95% confidence intervals (CIs) for AKI and mortality adjusting for sex, pre-existing comorbidities, race/ethnicity, illness severity, and clustering within centers. Sensitivity analyses assessed different baseline creatinine estimators. RESULTS: Overall, among 6874 hospitalized patients, 39.6% (n = 2719) developed AKI. There was a bimodal distribution of AKI by age with peaks in older age (≥60 years) and middle childhood (5-15 years), which persisted despite controlling for illness severity, pre-existing comorbidities, or different baseline creatinine estimators. For example, the adjusted OR of developing AKI among hospitalized patients with SARS-CoV2 was 2.74 (95% CI 1.66-4.56) for 10-15-year-olds compared to 30-35-year-olds and similarly was 2.31 (95% CI 1.71-3.12) for 70-75-year-olds, while adjusted OR dropped to 1.39 (95% CI 0.97-2.00) for 40-45-year-olds compared to 30-35-year-olds. CONCLUSIONS: SARS-CoV2-related AKI is common with a bimodal age distribution that is not fully explained by known risk factors or confounders. As the pandemic turns to disproportionately impacting younger individuals, this deserves further investigation as the presence of AKI and SARS-CoV2 infection increases hospital mortality risk.

Original languageEnglish (US)
Article number63
Pages (from-to)63
Number of pages1
JournalBMC Nephrology
Issue number1
StatePublished - Dec 2022

Bibliographical note

Funding Information:
The SCCM Discovery VIRUS registry is funded in part by the Gordon and Betty Moore Foundation, and Janssen Research & Development, LLC. They had no influence on analysis, interpretation and reporting of pooled data.

Publisher Copyright:
© 2022, The Author(s).


  • AKI
  • Age-spectrum
  • COVID-19
  • Hospitalization

PubMed: MeSH publication types

  • Research Support, Non-U.S. Gov't
  • Observational Study
  • Multicenter Study
  • Journal Article


Dive into the research topics of 'SARS-CoV-2 infection increases risk of acute kidney injury in a bimodal age distribution'. Together they form a unique fingerprint.

Cite this