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Meta-analysis on physiological index. No statistical deference was found in the risk of bradycardia (RR, 0.73; 95% CI, 0.32–1.68), tachycardia (RR, 0.65; 95% CI, 0.38–1.10), and desaturations incidence (RR, 0.73; 95% CI, 0.32–1.68) between 2 groups. CI = confidence interval, RR = risk ratios.
