Evolution of treated obstructive sleep apneas syndrome after bariatric surgery: an observational retrospective study.

Background: The resolution of obstructive sleep apneas syndrome (OSAS) following bariatric surgery appears to be promising for the majority of patients although this resolution does not necessarily exhibit a linear correlation with weight loss. Previous small-scale studies have pinpointed a younger age and preoperative weight under 100kg as predictive factors of OSAS improvement OBJECTIVES: The primary objective was to evaluate the evolution of OSAS in patients treated with continuous positive airway pressure (CPAP). Additionally, we tried to identify potential predictive factors for OSAS improvement postsurgery.