Figure 2From: Type 2 diabetes and pre-diabetes are associated with obstructive sleep apnea in extremely obese subjects: A cross-sectional studyCategories of morbidly obese subjects according to various levels of the apnea-hypopnea index (AHI). Dotted bars represent patients without OSA (AHI < 5 events/hour). Mild OSA is defined as AHI 5 - 15 events/hour, moderate OSA as 15 - 30 events/hour and severe OSA as > 30 events/hour.Back to article page