We retrieved BG data from CGM serially every 5 min and placed to group 1) preoperative period (Preoperative night: 6 pm–6 am of the day before surgery), 2) the morning day of surgery (morning of operation day: 6–8 am), 3) intraoperative period before CPB (Pre CPB), 4) CPB period (In CPB), 5) post CPB period (Post CPB: after off-CPB time to end of the operation), 6) postoperative period the day of surgery (POD 0: 6 pm–12 pm day of surgery), 7) postoperative period day 1 (POD1: after midnight of the day of surgery to midnight of another day), 8) postoperative period day 2 (POD2: after midnight of POD1 to midnight of another day). Overall perioperative period (Perioperative period) was counted from 6 pm of the day before surgery to midnight of POD2. All BG values from CGM regard to nine periods were analyzed into a mean with a 95% confidence interval.
GV measure in the present study was standard deviation (SD) calculated by using 5-mi interval of BG levels from CGM. SD was calculated in terms of nine group periods.
Additionally, we retrieved BG data from POCT-glucose to summarize events of hypoglycemia (<70 mg/dL), hyperglycemia (>180 mg/dL), and displayed box plots in a timeline with labeling administrations of liraglutide.