Figure. Oxygen Saturation Pairs Over Time for Black and White Patients in the 48-Hour Perioperative Period Around Stage 1 Palliation (S1P).

A, Boxes indicate the total number of oxygen saturation as measured by pulse oximetry (Spo₂)-arterial oxygen saturation (Sao₂) pairs for each 4-hour time interval (2764 Spo₂-Sao₂ pairs included in the final linear mixed-effects model), with the center line indicating the median and the whiskers 1.5 times the IQR. B, Oxygen saturation pair difference adjusted for multiple measurements per patient.