Independent association of serum IgA levels with moderate-to-severe obstructive sleep apnea in children with adenotonsillar hypertrophy.

Notably, while Adenoid Size was significant in univariate analysis, it showed only borderline significance in the multivariate model ( P = 0.057), suggesting its effect might be partially captured by other variables or is less critical than tonsillar size in this specific cohort. 3.5 Diagnostic performance (ROC analysis) To evaluate the translational potential of these findings, Receiver Operating Characteristic (ROC) curve analysis was performed ( Table 5 and Figure 3 ).

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