Individuals with Down syndrome (DS) are predisposed to obstructive sleep apnoea (OSA) due to craniofacial features (eg, midface hypoplasia, glossoptosis) and studies have shown that the prevalence of OSA in this population is markedly increased compared with that of typically developing children. Adenotonsillectomy is considered the first-line treatment for childhood OSA. However, persistent OSA is common, thus many children with DS are referred for positive airway pressure (PAP) therapy initiation; PAP appears to be an important aspect of living with DS. PAP has been shown to be highly effective in the general population for treating OSA and improving OSA-associated neurobehavioural symptoms, such as quality of life, behaviour, mood, daytime sleepiness and school performance. However, PAP as a treatment for OSA has not been well-studied in children with DS. Therefore, we designed a multicentre randomised controlled trial recruiting children with DS and OSA at three academic institutions, aged 6–18 years, referred for PAP initiation to treat OSA.

86 participants will be randomised to a 6-month intensive behavioural intervention (INT) to improve PAP adherence versus standard clinical care and underwent standardised evaluations of quality of life, behaviour, attention, PAP adherence and healthcare utilisation at baseline, 6 months and 12 months.

This study has been approved by the institutional review board at Children’s Hospital of Philadelphia (IRB of record, IRB # 20–0 17 512). Cincinnati Children’s Medical Center and University of Miami delegated IRB review and approval responsibility to Children’s Hospital of Philadelphia through reliance agreements as mandated by National Institutes of Health (NIH). All participants will be minors; consent will be obtained from parents and assent from participants will be obtained when possible. The intervention tested in this trial is considered not greater than minimal risk, and no identifiable data will be reported. As required by the NIH, a data safety monitoring board (DSMB) has been formed, who will review and approve the protocol and any protocol changes prior to implementation. The study team will send biannual reports and hold a biannual meeting with the DSMB to review any safety and protocol concerns. Findings will be presented at national conferences pertinent to this topic and published in peer-reviewed medical journals. In addition, findings will be shared in the lay format with DS associations around the world and used for training of healthcare providers and trainees (R25HD118212). Further, data collected will be deposited in a repository (National Sleep Research Resource; sleepdata.org) after completion of the study to maximise use by scientific community.

NCT04132999.