Effect of Diabetes and Hemoglobin A1c on Complications Following Elective Hand Surgery

Background: Limited research exists investigating the association between diabetes and glycemic control on complications following elective hand surgery. The goal of this research was to assess the incidence of complications within 30 days of elective hand surgery in a large population of diabetic patients compared to a population of non-diabetics. Furthermore, we sought to examine the relationship of glycemic control, as measured by HbA1c, and postoperative complications. Methods: We performed a retrospective review of electronic medical records at our institution of all patients who underwent elective hand, forearm, or elbow surgery from the dates of January 1^st, 2008 to December 31^st, 2017. Patients were categorized as diabetic or non-diabetic and most recent HbA1c was documented. Multivariable analysis was employed to compare the incidence of surgical complications within 30 days between the diabetics and non-diabetic populations, adjusting for baseline patient characteristics. Results: A total of 3,261 patients met the inclusion criteria. There were 646 (20%) diabetic patients and 2,615 (80%) non-diabetic patients. No difference was found in the overall rate of complications between the cohort of diabetic and non-diabetic patients. Additionally, statistical analysis found no difference in the complication rate between insulin and non-insulin controlled diabetics. Rates of complications were stratified based on HbA1c level and statistical analysis found no increased risk of complications with increased hemoglobin A1c value. Conclusions: In our present study we were not able to demonstrate any significant difference in the 30 day complication rates between and non-diabetics undergoing elective hand surgery. This study attempted to aid in risk stratification of diabetic patients by evaluating preoperative glycemic indices in the form of HbA1c.