Three in a Bed: Can Partner Support Improve CPAP Adherence? A Systematic Review and Intervention Recommendations.

: Continuous positive airway pressure (CPAP) is the standard approach for treating obstructive sleep apnea syndrome (OSAS), but patient adherence is often low due to various influencing factors. Recently, researchers have increasingly begun to explore the influence of partner support on adherence to CPAP therapy. This systematic review seeks to consolidate current evidence regarding the impact of partner support on CPAP adherence in individuals with OSAS. : A comprehensive literature search was carried out across PubMed, Scopus, Medline, PsycINFO, and Web of Science databases under PRISMA guidelines. Stringent inclusion criteria were used, and at least two independent reviewers screened all studies. The mixed methods appraisal tool (MMAT) was used to assess selected articles for quality. Data relevant to the review's objectives were extracted and presented through narrative synthesis. The review protocol was preregistered (Prospero CRD420251016574). : Nine studies met the inclusion criteria. Findings highlighted the significant influence of adherence to CPAP. Partner support, relationship quality, and collaborative efforts emerged as facilitators of adherence, with partnered individuals exhibiting higher adherence to CPAP use. However, barriers such as anxiety, interruption in intimacy, and conflict in relationships were also identified. : To the best of our knowledge, this is the first systematic review to synthesize evidence on the partner's role in CPAP adherence and inform clinicians on the importance of providing personalized care based on biopsychosocial characteristics of patients; for example, assessing the partner support in the management of the illness. Furthermore, the findings emphasize the need for further research-particularly randomized controlled trials and dyadic designs-to deepen understanding of how partner dynamics influence effects of CPAP treatment.