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Prediabetes assessment and follow-up in older veterans with schizophrenia.

Copeland LA, Parchman ML, Zeber JE, Lawrence VA, Downs JR, Miller AL. Prediabetes assessment and follow-up in older veterans with schizophrenia. The American journal of geriatric psychiatry : official journal of the American Association for Geriatric Psychiatry. 2010 Oct 1; 18(10):887-96.

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OBJECTIVES: Assess glycemic monitoring and follow-up. DESIGN: Retrospective study using administrative data (October 2001-September 2005). SETTING: Veterans Health Administration. PARTICIPANTS: A nationwide sample of 39,226 outpatients aged 50 years or older with schizophrenia. Patients had no diagnosis or medications for diabetes at baseline. MEASUREMENTS: Hemoglobin A1c tests; blood glucose tests with same-day low-density lipoprotein to approximate fasting glucose. Glycemic tests were combined to indicate a) prediabetic dysglycemia (100-125 mg/dL proxy fasting glucose or 5.8%-6.4% hemoglobin A1c) and b) diabetic dysglycemia ( 126 proxy fasting glucose or 6.5% A1c). RESULTS: Approximately one-third of patients (32%; 12,587) had proxy fasting blood glucose or A1c tests in 2002; multiple tests were rare. The proportion tested increased to 40% by 2005. Test results suggested prediabetic dysglycemia for 5,345 tested patients (42% of those tested) and diabetic dysglycemia for 1,287 tested patients (10%) at baseline. In multivariate regression models, glycemic testing was associated with dyslipidemia, hypertension, and younger age. Dysglycemia was associated with hypertension, dyslipidemia, and older age. Follow-up treatment/diagnosis of diabetes occurred for 8% of patients (11% of those tested) and was associated with baseline dysglycemia, hypertension, and younger age. Mortality (15% during the 4-year study) was higher among untested and untreated patients. CONCLUSIONS: Dysglycemia was prevalent among older patients with schizophrenia, although monitoring and follow-up were uncommon. Follow-up treatment correlated with survival. Despite evident utility of testing, few at-risk patients with schizophrenia were adequately monitored, diagnosed, or treated for dysglycemia.

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