Obesity, Inflammation, and Clinical Outcomes in COVID-19: A Multicenter Prospective Cohort Study
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View abstract on PubMed
Summary
This summary is machine-generated.Obesity increases the risk of severe COVID-19 outcomes, particularly in younger individuals and before Omicron variants emerged. Inflammation, specifically soluble urokinase plasminogen activator receptor (suPAR), significantly mediates this association.
Area Of Science
- Infectious Diseases
- Immunology
- Epidemiology
Background
- Obesity is a known risk factor for severe outcomes in COVID-19 patients.
- The precise mechanisms linking obesity to adverse COVID-19 outcomes remain incompletely understood.
- Inflammation is hypothesized to play a crucial role in mediating this relationship.
Purpose Of The Study
- To investigate whether inflammatory markers mediate the association between obesity and COVID-19 outcomes.
- To assess the role of soluble urokinase plasminogen activator receptor (suPAR) as a mediator.
- To examine how this association varied across different COVID-19 variants (pre- and post-Omicron).
Main Methods
- Prospective multi-center observational study (International Study of Inflammation in COVID-19 - ISIC).
- Inclusion of hospitalized COVID-19 adult patients (February 2020 - October 2022).
- Measurement of inflammatory biomarkers (including suPAR) and body mass index (BMI) at admission; analysis of composite outcomes (death, mechanical ventilation, renal replacement therapy).
Main Results
- Individuals with BMI > 40 had significantly higher odds of adverse composite outcomes compared to non-obese individuals.
- Soluble urokinase plasminogen activator receptor (suPAR) was identified as a significant mediator between BMI and composite outcomes.
- The association between obesity and adverse outcomes was stronger in younger participants (<65 years) and during the pre-Omicron variant period.
Conclusions
- Obesity is significantly associated with worse COVID-19 outcomes, especially in younger populations and prior to the Omicron variant.
- Inflammation, quantified by suPAR levels, acts as a key mediator in the relationship between obesity and adverse COVID-19 outcomes.
- These findings highlight the importance of considering inflammatory pathways in managing obese COVID-19 patients.
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