Association and Interacting Factors between Bronchial Asthma and Attention-deficit Hyperactivity Disorder in Children: Meta-analysis and Systematic Review.

Background: This study aims to systematically assess the possible link between bronchial asthma usage and attention-deficit hyperactivity disorder (ADHD) in children.

Methods: PubMed, Web of Science, ScienceDirect, CNKI, Wanfang, and the China Biological Medicine Database (CBM) were searched for relevant articles published from database inception until September 28, 2023. The statistical analyses were conducted using Stata 15.1 software, followed by a quantitative meta-analysis to synthesize the results of the odds ratios (ORs) and their corresponding 95% confidence intervals (CIs).

Results: A total of 10 articles involving 729,375 participants were included in the meta-analysis. The overall analysis revealed a statistically significant association between ADHD and an increased likelihood of having bronchial asthma, as indicated by a pooled odds ratio (OR) of 1.46 and a 95% confidence interval (CI) ranging from 1.41 to 1.51, p < 0.001, I2 = 58%. Potential associated factors linking bronchial asthma and ADHD in children include demographic characteristics, healthcare access, socioeconomic factors, comorbidities, genetic susceptibility, immune dysregulation, chronic conditions, growth and development factors, and parental/environmental influences.

Conclusion: This systematic review and meta-analysis presents convincing evidence for a notable link between bronchial asthma and ADHD in children. The results indicate an increased likelihood of bronchial asthma among children with ADHD compared to those without the condition. Additionally, various potential factors can underlie the association between bronchial asthma and ADHD in children, necessitating further research to fully comprehend their complex relationship. These findings have implications for clinical practice, highlighting the need for an integrated approach in managing asthma and ADHD.