Comparison of anesthetic procedures between the two groups during the induction phase.

<p>Data are presented as means± SD; or number (%).</p><p>Closed-loop = automated control of propofol infusion group guided by the bispectral index; Opened-loop = manual control infusion group guided by the bispectral index; The induction time = the time from the infusion of propofol and remifentanil to a BIS maintained at <60 for 30 seconds; SR = burst suppression ratio was calculated as SR>10% lasting at least one minute.</p><p>Comparison of anesthetic procedures between the two groups during the induction phase.