Factors Differentiating Multisystem Inflammatory Syndrome in Children (MIS-C) From Severe/Critical COVID-19 Infection...

Area of Science:

• Pediatric Infectious Diseases
• Immunology
• Critical Care Medicine

Background:

• Differentiating multisystem inflammatory syndrome in children (MIS-C) from severe coronavirus disease 2019 (COVID-19) is clinically challenging.
• Both conditions can present with overlapping symptoms, necessitating accurate diagnostic markers.

Purpose of the Study:

• To identify key clinical and laboratory features that differentiate MIS-C from severe/critical COVID-19 in pediatric patients.
• To develop a predictive model for MIS-C diagnosis.

Main Methods:

• A single-center chart review compared characteristics of children diagnosed with MIS-C versus severe/critical COVID-19.
• Multivariate logistic regression analysis was employed to build predictive models.

Main Results:

• MIS-C patients exhibited higher rates of fever, mucocutaneous, cardiac, and gastrointestinal involvement, with fewer respiratory symptoms compared to COVID-19 patients.
• Key differentiating factors identified included elevated C-reactive protein (CRP), thrombocytopenia (low platelet count), mucocutaneous involvement, and absence of respiratory symptoms.
• A predictive model incorporating CRP, platelet count, gastrointestinal/mucocutaneous involvement, and lack of respiratory symptoms achieved a performance of 0.94.

Conclusions:

• Elevated CRP levels, thrombocytopenia, and mucocutaneous involvement are significant indicators for differentiating MIS-C from severe COVID-19 in children.
• A diagnostic approach utilizing CRP, platelet count, and specific symptom patterns demonstrates high specificity for MIS-C.