Serum Cortisol Response in Acute Hypoglycemic Diabetic/Non Diabetic Patients Arriving through Emergency Department – A Comparative Study

Background and objectives: Hypoglycemia in the body is controlled by counter regulatory hormones. Serum cortisol is one among them not subjected to extensive study, in Type 2 diabetes mellitus cases. Cortisol responses among non diabetics and type 1 diabetics have been studied to a certain extent. The primary objective of our study was to identify the serum cortisol levels in hypoglycemic patients with or without type 2 diabetes and to find out the correlation between the mean cortisol responses in the two groups. Methodology: A total population of 51 symptomatic hypoglycemic patients meeting Whipple’s criteria were studied in the ER of a medical college hospital at Kochi. Forty patients were diabetic and 11 non diabetic. Previous history, present illness, comorbidities, medical history and reasons for hypoglycemia were considered. Laboratory investigations on RFT, 7 AM serum cortisol and RBS were made and the results analysed applying standard statistical methods and SPSS II software. Results and discussion: Male female ratio in the diabetic and non diabetic groups was 3:1 and 10:1 respectively. Hypoglycemia was more among males, especially in the diabetic group due to decreased food intake(49%) or concurrent illness(51%), the mean age being 65.7 years in these cases. Hypoglycemia was more frequent in those on sulfonylurea (61.9%), and in habitual insulin users (42.5%). In non diabetic patients, hypoglycemia was caused by renal failure(27.27%), insulinoma(27.27%) or sepsis(18.18%). The mean serum cortisol among the diabetic group was subnormal(17.47), and in the non diabetic group it was 28.56. Age, sex, serum creatinine, GCS, period of stay and condition at discharge showed no correlation with serum cortisol levels. RBS, period of stay and condition at discharge showed no correlation with diabetic status. Conclusion: Diabetic patients with acute symptomatic hypoglycemia demonstrated a subnormal serum cortisol response as compared to non diabetic hypoglycemic patients.