CPAP therapy of obstructive sleep apnea in type 2 diabetics improves glycemic control during sleep.

Type 2 diabetes and obstructive sleep apnea (OSA) are frequently comorbid conditions. OSA is associated with increased insulin resistance, but studies of continuous positive airway pressure (CPAP) have shown inconsistent effects on glycemic control. However, endpoints such as hemoglobin A1c and insulin sensitivity might not reflect short-term changes in glycemic control during sleep.We used a continuous glucose-monitoring system to measure...