Figure 2: (a) Serum 1,5-anhydroglucitol (1,5-AG) concentrations before surgery (Pre) and 24 h (24h) after the initiation of surgery among all patients and patients with and without diabetes mellitus (total, DM, and non-DM patient groups, respectively). **p<0.01 compared with preoperative concentrations in each group. (b) Decrease rate in 1,5-AG concentrations from before surgery to 24 h in the total, non-DM, and DM patient groups. There were no significant differences between the groups.