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Mean total cognitive performance across snore apnea–hypopnea index (AHI) groups by (A) race and/or ethnicity, (B) asthma status, (C) sex, and (D) body mass index (BMI). Error bars represent SE. Regression analyses using continuous AHI as a covariate illustrated that only the main effect for race was significant (P < 0.001; all other P > 0.05). No interaction terms with these variables and AHI were significant (P > 0.05). Numbers in parentheses represent regression analysis sample.
