The purpose of this study was to examine whether the increased glycemic variability associated with systemic glucocorticoid treatment is also associated with increased incidence of hypoglycemia.

All patients discharged from internal medicine units between 2010 and 2013 were included in this retrospective analysis. Patients were assigned to 3 groups: Group 1: no steroids were prescribed;. Group 2: topical or inhaled steroids were prescribed with no systemic treatment; and Group 3: systemic steroids were prescribed, with or without topical or inhaled treatment.

A total of 45,272 patients were included in the study. Patients in Group 3 had significantly higher rates of hypoglycemia (10.9%) compared to patients in Group 2 (7.4%), and patients in Group 1 (7.3%). Patients with diabetes mellitus had higher rates of hypoglycemia compared to patients without diabetes mellitus (14.3% vs 4.9%) but exhibited similar trends in response to steroid treatment. Multivariate analysis showed that systemic steroids were associated with increased risk for hypoglycemia (odds ratio [OR] 1.513, 95% confidence interval [CI] 1.311-1.746, P <0.001). Hypoglycemia associated with systemic steroid treatment was also associated with increased risk of death (hazard ratio [HR] 2.328, 95% CI 1.931-2.807, P <0.001). Patients who were treated with systemic steroids but did not have hypoglycemia did not have higher mortality rates (HR 1.068, 95% CI 0.972-1.175, P = 0.171).

Treatment with systemic steroids is associated with increased hypoglycemia incidence during hospitalization. Patients treated with steroids that had incident hypoglycemia had a higher 1-year mortality risk compared to patients without hypoglycemia treated with steroids.