QLTI-05. HBA1C AND INSULIN COVERAGE FOR NEWLY DIAGNOSED HGG PATIENTS IN THE HOSPITAL

Abstract

Abstract Corticosteroids are used in the management of patients with high-grade gliomas (HGG). Corticosteroids lead to elevated serum glucose levels, necessitating sliding-scale insulin. A hemoglobin A1c (HbA1c) reflects historical serum glucose levels but it’s unclear if it predicts corticosteroid-induced hyperglycemia. We retrospectively reviewed all newly diagnosed HGG patients who were admitted between Jan 2019 to July 2021 who had an HbA1c performed at the time of their diagnosis. HbA1c is classified into: normal (< 5.6%), elevated (5.7 – 6.4%) and diagnostic (> 6.5%). We identified 86 patients of whom 29 and 16 had elevated and diagnostic HbA1c, respectively. These patients were more likely to require sliding scale insulin at least twice during their hospitalization, 64% vs 13% of those with a normal HbA1c. Only 28% of patients had a history of diabetes. There was no correlation between elevated HbA1c and the likelihood of initiating post-operative therapy, surgical complications, or BMI results. When reviewing age, 39 patients were less than 65, of which 34% had at least an elevated HbA1c. Of those older than 65, 65% had at least an elevated HbA1c. Our analysis suggests there is a predictive value of HbA1c and the need for sliding-scale insulin while receiving corticosteroids in the HGG population, especially in the older population. We recommend screening all new HGG patients with an HbA1c at the time of diagnosis, regardless if they have a history of diabetes. We also recommend monitoring serum glucose less frequently with those who have a normal HbA1c. If the HbA1c is elevated or diagnostic, they should have monitored serum glucose levels with available sliding-scale insulin. If the patient is > 65 years of age, they should be considered a higher risk for having hyperglycemia and HbA1c should be reviewed. Further analysis is being conducted and will be reviewed at a later date.