ng in an apnea/hypopnea index (AHI) of 6.4 events per hour. The supine AHI was 7.1 events per hour, and the non-supine AHI was 0.0 events per hour. Oxygen Desaturation Index (Number of 4% desaturations per hour) = <1/hour. Moderate snoring. NREM R ALL stages AHI Obstructive Apnea 7.0/hr 0 1.8/hr 0 0/hr 6.