Allergic Rhinitis Amplifies Asthma Risk in Patients With Chronic Rhinosinusitis: A Large‐Scale Retrospective Cohort Analysis

CRS is associated with increased risk of incident asthma and subsequent exacerbations, and coexisting AR identifies a higher-risk phenotype within CRS. These findings highlight the need for phenotype-informed studies to determine whether targeted upper-airway management can mitigate downstream asthma burden.