RT Journal Article SR Electronic T1 Cancer risk in patients with sleep apnoea following adherent 5-year CPAP therapy JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 2101935 DO 10.1183/13993003.01935-2021 VO 59 IS 4 A1 Grégoire Justeau A1 Sebastien Bailly A1 Chloé Gervès-Pinquié A1 Wojciech Trzepizur A1 Nicole Meslier A1 François Goupil A1 Thierry Pigeanne A1 Sandrine Launois A1 Laurene Leclair-Visonneau A1 Philippe Masson A1 Acya Bizieux-Thaminy A1 Jean-Louis Racineux A1 David Gozal A1 Frédéric Gagnadoux YR 2022 UL http://erj.ersjournals.com/content/59/4/2101935.abstract AB Background Increasing evidence suggests that obstructive sleep apnoea (OSA) contributes to cancer risk; however, limited data are available on the impact of continuous positive airway pressure (CPAP) therapy on cancer incidence. We aimed to determine whether adherence to CPAP therapy is associated with a reduction in all-cancer incidence compared with nonadherent patients with OSA.Methods The study relied on data collected by the multicentre Pays de la Loire Sleep Cohort study, linked to health administrative data, so as to identify new-onset cancer. We included patients who were prescribed CPAP for OSA, with no history of cancer before the diagnostic sleep study or during the first year of CPAP. Patients with documented CPAP use for ≥4 h per night were defined as adherent. Those who discontinued or used CPAP <4 h per night constituted the nonadherent group. A propensity score inverse probability of treatment weighting analysis was performed to assess the effect of CPAP adherence on cancer risk.Results After a median (interquartile range) follow-up of 5.4 (3.1–8.0) years, 437 (9.7%) out of 4499 patients developed cancer: 194 (10.7%) in the nonadherent group (n=1817) and 243 (9.1%) in adherent patients (n=2682). The final weighted model showed no significant impact of CPAP adherence on all-cause cancer risk (subdistribution hazard ratio 0.94, 95% CI 0.78–1.14).Conclusions Adherence to CPAP therapy in OSA patients was not associated with a reduction in all-cancer incidence. Whether adherent CPAP therapy of OSA might reduce the risk of specific cancer sites should be further evaluated.In a multicentre-based cohort of patients with mild-to-severe obstructive sleep apnoea, sustained and adherent CPAP therapy was not associated with a reduction in all-cancer incidence after a median follow-up time of 5.4 years https://bit.ly/3mdiOxI