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This study investigates the use of pulse photoplethysmography (PPG) for the detection of sleep apnea and its added value to oxygen saturation (SpO2) based detection. PPG-time series known to be modulated by both respiration and the autonomous nervous system were derived: pulse rate, amplitude and width variability, slope transit time, maximal pulse upslope and the area under the PPG peak. Moreover, the instantaneous power in the high and low frequency band of the pulse rate was estimated usingdoi:10.22489/cinc.2018.134 dblp:conf/cinc/Deviaene0HTBHV18 fatcat:bmny2s6drnhzpdd4n5pdg73nh4