A Pilot Study of Detecting Individual Sleep Apnea Events Using Noncontact Radar Technology, Pulse Oximetry, and Machine Learning

Figure 3

Comparison of HSAT and Somnofy+SpO₂ for temporal distribution of events for patients with no, mild, moderate, and severe sleep apnea. Classifications second by second for HSAT (blue) and Somnofy+SpO₂ (orange) plotted on the positive and negative -axis, respectively, against time (only denoted by hours) on the -axis. Parts (a), (b), (c), and (d) show two randomly picked nights with no, mild, moderate, and severe sleep apnea, respectively.