Association Between Asthma and Juvenile Idiopathic Arthritis in Children in the United States: A Propensity Score Weighted Cross-Sectional Study," published in Pediatric Rheumatology and accepted in February 2026. The authors are Dr. Yu-Sheng Lee and Dr. Jessica Madrigal of the UIS MPH program, with student contributions from Kira Gor and Riya Elizabeth George.

The Research Question

The study investigates whether there is a measurable association between asthma and juvenile idiopathic arthritis (JIA) in children, and two conditions that are individually well-studied but whose potential relationship has represented a long-standing gap in the pediatric health literature. JIA is the most common chronic rheumatic disease in children, and asthma is the most prevalent chronic airway condition in the same population, making their potential co-occurrence clinically significant.

The Data and Methods

The team drew from the National Survey of Children's Health (NSCH) spanning 2016 to 2021 - a nationally representative dataset, examining a sample of 225,443 children across the United States. The methodological choice of propensity score weighting is notable: it is a sophisticated statistical technique that balances the characteristics of compared groups to reduce confounding, bringing the analysis closer to the rigour of an experimental design despite the cross-sectional nature of the data.

The Key Finding

Children diagnosed with asthma had 2.10-fold higher odds of also having juvenile idiopathic arthritis compared to children without asthma, with a p-value below 0.0001, meaning the result is highly statistically significant and very unlikely to be due to chance.

What It Means Clinically

The implications run in two directions. First, asthma may function as an early clinical risk indicator for immune-mediated musculoskeletal conditions like JIA, meaning clinicians seeing a child with asthma might have reason to monitor for early JIA symptoms rather than treating the two conditions as entirely unrelated. Second, the finding supports the hypothesis that asthma and JIA share underlying inflammatory and immunoregulatory pathways, rather than asthma being purely an isolated airway disease. This reframes how both conditions might be understood and eventually treated at a mechanistic level.

Why It Matters for the UIS MPH Program

Beyond the scientific contribution, this publication is significant for two institutional reasons. It represents a faculty research output at the intersection of epidemiology, biostatistics, and pediatric public health, which is directly aligned with the program's academic identity. And the named student contributors, Kira Gor and Riya Elizabeth George, demonstrate that the MPH program is producing graduates with genuine research experience and publication credits, which is a meaningful differentiator for students entering the public health job market.