Fig. 4From: Effects of audio and visual distraction on patients’ vital signs and tolerance during esophagogastroduodenoscopy: a randomized controlled trialChanges in blood oxygen saturation from pre-distraction to post-EGD in the 4 groups. EGD, esophagogastroduodenoscopy; *p < 0.01; **p < 0.005Back to article page