Diabetes in Urban African-Americans. I. Cessation of Insulin Therapy Is the Major Precipitating Cause of Diabetic Ketoacidosis

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Abstract
OBJECTIVE: To identify the causes of diabetic ketoacidosis (DKA) in a large urban hospital. RESEARCH DESIGN AND METHODS: Consecutive patients admitted during a 3-month period with a primary diagnosis of DKA and who had moderate-to-severe illness as shown by serum glucose >13.9 mmol/l (>250 mg/dl), bicarbonate 80% recalled having been instructed as to blood glucose testing and acute and chronic complications, but fewer patients recalled having been instructed as to insulin dose adjustment (28%) or sick day management (35%). Symptoms of decompensated diabetes were recognized in 55% of the 42 episodes of DKA in patients with known diabetes. However, only 5% of patients contacted the Diabetes Unit when they became ill; the majority (95%) went directly to the emergency room. CONCLUSIONS: DKA occurred most often in patients with known diabetes who stopped insulin therapy because of reported lack of money for purchasing insulin or for transportation to the hospital and limited self-care skills in diabetes management. In urban African-American populations, up to two-thirds of the episodes of DKA may be preventable by improving patient education and access to care.

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