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Figure. Description of sampling and response rate. *Patients receiving care in one of the Translating Research into Action for Diabetes (TRIAD) study health plans or Department of Veterans Affairs (VA) health care systems and who had diabetes diagnosis based on the following criteria: a diagnostic code for diabetes (for example, 2 or more outpatient visits with an associated diabetes code [International Classification of Diseases, Ninth Revision, 250.xx] or 1 or more inpatient stays with an associated diabetes code); a laboratory value suggestive of diabetes (for example, 2 or more hemoglobin A1c tests or diagnostic levels of hemoglobin A1c or fasting blood glucose); or a prescription for medications for diabetes (for example, insulin or an oral antidiabetic agent).  At the time of the survey, patients who met the initial criteria were included only if they verified that they had diabetes and received most of their diabetes care through the participating TRIAD health plan or a participating VA facility. CMC = commercial managed care.
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