Objectives: To compare the percentage of diabetics admitted to the hospital due to hypoglycemia in 1990-1993 (period 1) to that in 1997-2000 (period 2).Methods: We analyzed data from the California Hospital Discharge Data Program. Eligibility included diabetic (ICD code 250) subjects aged > or =25 years old who were hospitalized due to hypoglycemia (ICD Codes 250.