Prevalence and risk factors for diabetes and diabetes-related amputations in American Indians in southern Arizona

OBJECTIVE: To describe the prevalence of NIDDM and LEA using data from a computer-based patient data base. RESEARCH DESIGN AND METHODS: Diabetic patients with and without LEA, and nondiabetic patients were identified by computer search. Charts of diabetic patients were reviewed for confirmation of diagnosis of diabetes and diabetes-related amputation. The diabetic and nondiabetic populations were described, and certain risk factors were identified. RESULTS: The overall prevalence of NIDDM in this tribe in 1985-1986 was 18.3/100 adults (> or = 18 yr of age), whereas the prevalence of LEA/100 adults with NIDDM was 10.3%. Females were 1.3 times as likely to have diagnosed diabetes as males (95% CI 1.2-1.4), and males with diabetes were 1.4 times more likely to have had LEA than females with diabetes (95% CI 1.1-1.9). CONCLUSIONS: Automated health-care delivery data base used for this tribe can be used to maintain surveillance for diabetes and amputations in diabetic patients. Effective programs to prevent complications of diabetes, such as LEA, in this tribe are urgently needed.