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Table 1 Variables included in the electronic diabetes case-finding model

From: Identifying patients with diabetes and the earliest date of diagnosis in real time: an electronic health record case-finding algorithm

Identification variable Criteria* Encounter location Point value
ICD-9 encounter code 250.xx Inpatient or outpatient 0.75
Hemoglobin A1c ≥ 6.5% Inpatient or outpatient 1.00
Fasting Blood Glucose ≥ 126 mg/dL Outpatient only 0.50
Random blood glucose ≥ 200 mg/dL Outpatient only 0.50
2-hour OGTT ≥ 200 mg/dL Inpatient or outpatient 0.75
Problem list or PMH 250.xx Inpatient or outpatient 0.40
Diabetes medication** Present Outpatient only 1.00
Metformin Present Outpatient only 0.75
  1. Abbreviations: ICD-9: International Classification of Diseases 9, OGTT: oral glucose tolerance test, PMH: past medical history, mg: milligram, dL: deciliter.
  2. *Criteria are counted only once except for ICD-9 codes (maximum twice) and random and fasting blood glucose (maximum twice each) as long as repeated glucose values are ≥ 3 months apart.
  3. **Insulin, sulfonylurea, thiazolidinedione, alpha glucosidase, DPP-4 inhibitor, meglitinide, amylin mimetic, incretin mimetic, combination medication.