Pulmonary hypertension has been recognized as being associated with obstructive sleep apnoea (OSA). Continuous positive airway pressure (CPAP) might reduce pulmonary artery pressure in OSA patients; however, evidence from clinical studies is limited and inconsistent. This meta‐analysis aims to assess whether CPAP is associated with a decrease in pulmonary artery pressure in patients with OSA.

This systematic review was performed in accordance with the Meta‐analysis of Observational Studies in Epidemiology guidelines. Published studies were identified through a search in MEDLINE, EMBASE and the Cochrane library through to May 2013. Two reviewers sorted papers and extracted data. A random‐effects model was used to combine results across studies comparing pulmonary artery press...