The association between asthma and ADHD in children and adolescents: An observational study and a meta-analysis of Mendelian randomization studies

Observational epidemiological analysis and a meta-analysis of Mendelian randomization (MR) were used to investigate the association between attention-deficit/hyperactivity disorder (ADHD) and asthma in children and adolescents. Based on data from the 1999 to 2004 National Health and Nutrition Examination Survey (NHANES), an analysis was conducted to evaluate the association between ADHD and asthma in children and adolescents aged between 4 and 19 years. ADHD and asthma were defined based on…

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