Prevalence of Obstructive Sleep Apnea in Vietnamese Children with Attention Deficit Hyperactivity Disorder (ADHD).

Introduction: Obstructive sleep apnea (OSA) is a common sleep-related breathing disorder among children with attention deficit hyperactivity disorder (ADHD). This study aims to determine the prevalence of OSA in children with ADHD, compare the differences in clinical characteristics between children with ADHD-OSA and those without OSA (ADHD-nonOSA), and to identify the correlation between OSA and ADHD in children.

Methods: This cross-sectional descriptive study was conducted on 524 children with ADHD, aged 6-12 years, at the Vietnam National Children's Hospital from October 2022 to September 2023. Respiratory polygraphy was used to determine the prevalence of OSA in this study population; clinical data of children with ADHD-OSA and ADHD-nonOSA were collected and analyzed in each group. The severity of ADHD symptoms was measured by the Vanderbilt ADHD Parent Diagnosis Rating Scale (VADPRS questionnaire), and the severity of OSA was defined by Apnea-Hypopnea Index (AHI).

Results: The prevalence of OSA in children with ADHD was 23.3%, with the majority of moderate-to-severe OSA. Significant differences were observed in sleep onset time, total sleep duration, and various sleep-related behaviors, such as bedtime resistance and difficulty waking up in the morning, between children with ADHD-OSA and ADHD-nonOSA (p < 0.001, p < 0.001, p < 0.05, and p < 0.005, respectively). The severity levels of inattention, hyperactivity, and behavioral disorders were significantly higher in children with moderate-to-severe OSA compared to those with mild OSA (p < 0.005, p < 0.005, and p < 0.001, respectively). There were significant correlations between AHI with inattention scores (r = 0.677; p < 0.0001), hyperactivity scores (r = 0.438; p = 0.05), behavioral disorder scores (r = 0.342; p < 0.05), and anxiety/depression scores (r = 0.357; p < 0.05) measured by VADPRS questionnaire.

Conclusions: OSA is a common sleep-related breathing disorder in children with ADHD, which might exacerbate ADHD symptoms. Thus, screening of OSA in children with ADHD is essential during the management of ADHD in this population.