Figure 5.

Receiver operator characteristics (ROC) curves of NF RDI and ODI 3% at home for the first night (A) and for 3 nights (B) for diagnosing OSA as defined by polysomnography Apnea Hypopnea index (PSG AHI) ≥5 events per hour and for the first night (C) and 3 nights (D) for diagnosing severe OSA defined as PSG AHI ≥30 events per hour. The accuracy for diagnosing OSA and severe OSA was high for both devices. There is no difference in the AUC between devices on the first night or after 3 nights for diagnosing OSA or for severe OSA.