Prevalence and Associated Factors of Eustachian Tube Dysfunction in Allergic Rhinitis with Middle-Ear Disease-Related Outcomes: A Systematic Review and Meta-analysis.

Preliminary evidence suggests that objective eustachian tube dysfunction or middle-ear dysfunction is frequently reported in allergic rhinitis and may affect a clinically meaningful subset of assessed patients.

However, the evidence base is small, geographically limited, and methodologically heterogeneous; therefore, the pooled estimate should be interpreted cautiously and confirmed by larger multicenter studies using standardized diagnostic criteria.