Résumé : Overweight and obesity are major causal factors for obstructive sleep apnea syndrome (OSAS), providing insight into why one third of patients with OSAS suffer from diabetes mellitus and another third from glucose intolerance. However, a significant proportion of the general population remains undiagnosed for glucose metabolism disorders. The primary aim of this study was to establish the prevalence of known and newly diagnosed glucose metabolism disorders in patients with moderate and severe OSAS referred to the sleep lab for continuous positive airway pressure (CPAP) therapy.