Effect of Preoperative Diabetes Management on Glycemic Control and Clinical Outcomes after Elective Surgery

Rajesh Garg, Brooke Schuman, Angela Bader, Shelley Hurwitz, Alexander Turchin, Patricia Underwood, Cheyenne Metzger, Raquel Rein, Meghan Lortie

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


Objective: The aim of this study was to evaluate whether preoperative diabetes management can improve glycemic control and clinical outcomes after elective surgery. Background: There is lack of data on the importance of diabetes treatment before elective surgery. Diabetes is often ignored before surgery and aggressively treated afterwards. Methods: Patients with diabetes were identified and treated proactively before their scheduled surgeries. Data for all elective surgeries over 2 years before and 2 years after implementation of the program were collected. Results: Out of 31,392 patients undergoing first surgery, 3909 had diabetes; 2072 before and 1835 after the program. Mean blood glucose on the day of surgery was 146.4 ± 51.9 mg/dL before and 139.9 ± 45.6 mg/dL after the program (P = 0.0028). Proportion of patients seen by the inpatient diabetes team increased. Mean blood glucose during hospital stay was 166.7 ± 42.9 mg/dL before and 158.3 ± 46.6 mg/dL after program (P < 0.0001). The proportion of patients with hypoglycemic episodes (<50 mg/dL) was 4.93% before and 2.48% after the program (P < 0.0001). Length of hospital stay (LOS) decreased among patients with diabetes (4.8 ± 5.3 to 4.6 ± 4.3 days; P = 0.01) and remained unchanged among patients without diabetes (4.0 ± 4.5 and 4.1 ± 4.8, respectively; P = 0.42). Changes in intravenous antibiotic use, patients discharged to home, renal insufficiency, myocardial infarction, stroke, and in-hospital mortality were similar among diabetic and nondiabetic groups. Conclusions: Preoperative and inpatient diabetes management improves glycemic control on the day of surgery and postoperatively and decreases the incidence of hypoglycemia. These changes may eventually improve clinical outcomes. Although statistically significant, the decrease in LOS was of equivocal clinical significance in this study.

Original languageEnglish (US)
Pages (from-to)858-862
Number of pages5
JournalAnnals of surgery
Issue number5
StatePublished - May 1 2018
Externally publishedYes


  • elective surgery
  • length of hospital stay
  • postoperative outcomes
  • preoperative diabetes management

ASJC Scopus subject areas

  • Surgery


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