Pediatric Inflammatory Multisystem Syndrome Associated With SARS-CoV-2: A Retrospective Cohort Study From Argentina

Area of Science:

• Pediatrics
• Infectious Diseases
• Immunology

Background:

• Multisystem inflammatory syndrome in children (MIS-C) is a rare but serious condition associated with SARS-CoV-2.
• Understanding the specific characteristics of MIS-C is crucial for early diagnosis and management.

Purpose of the Study:

• To identify differential characteristics distinguishing MIS-C from other conditions in children.
• To determine risk factors associated with the development of MIS-C.

Main Methods:

• A retrospective cohort study comparing 25 MIS-C patients with 75 COVID-19 controls.
• WHO criteria were used for MIS-C diagnosis.
• Multivariate logistic regression analysis was employed to identify significant variables.

Main Results:

• Age 2 years or older (OR 24.7), lymphopenia (OR 9.03), and platelet count <150x10^9/L (OR 11.7) were significantly associated with MIS-C.
• The presence of an underlying disease appeared to reduce the risk of MIS-C (OR 0.06).

Conclusions:

• MIS-C is more prevalent in children over 2 years old, particularly those with lymphopenia or thrombocytopenia.
• Underlying medical conditions may confer a protective effect against MIS-C development.