Table 2

Comparison of algorithms using electronic medical record data for identification of patients with type 2 diabetes
EMR elements
Reference Billing/Diagnostic codes Laboratory results1 Medications Timeframe Diabetes onset
[23] ≥ 1 short-stay hospital, skilled nursing facility, or home health agency claim or ≥ 2 physician/supplier claims with diabetes diagnosis -- -- 1 – 2 year identification period --
[24] 1 hospital discharge abstract or 2 physician services claims showing diabetes -- -- 2 year period --
[19] 250.X0, 250.X2, 357.2, 362.0X, 583.81 ≥ 1 high HbA1c or random glucose or ≥ 2 random glucose tests Metformin, sulfonylurea, or insulin -- --
[25] 250.X0, 250.X2, or 362.XX (no insulin) ≥ 1 high HbA1c or ≥ 2 high fasting or random glucose tests -- Diagnosis ≥ 30 days after first office visit First appearance in problem list
[26] On problem list (coded or free text) ≥ 2 times in 2 years ≥ 2 high fasting glucose tests in 1 year or any high HbA1c2 Hypoglycemic medications -- --
[27] 250.X High HbA1c, fasting, or random glucose3 Number unique anti-diabetes medications -- --
[28] ≥ 2 250.X0 or 250.X2 High HbA1c or fasting glucose test Insulin or oral hypoglycemic agents except metformin Surveillance in real time --
[29] No type 1 code, ≥ 2 type 2 codes Abnormal glucose or HbA1c Type 2 diabetes medications -- --
Current Study ≥ 1 250.X0 or 250.X2, ≥ 1 year before any type 1 code ≥ 2 high HbA1c or glucose test and ≥ 1 normal HbA1c or glucose test Excluded for diabetes medication > 30 days before diagnosis Normal and abnormal labs within 3 years Earliest of first diagnosis or second high lab

HbA1c, glycated hemoglobin.

1Laboratory values coincide with American Diabetes Association guidelines (HbA1c ≥ 6.5%, fasting blood glucose ≥ 126 mg/dl, random blood glucose ≥ 200 mg/dl) [20] unless otherwise specified.

2Fasting blood glucose > 7 mmol/L, HbA1c ≥ 7%.

3HbA1c > 6%, fasting or random glucose > 110 mg/dl.

Onitilo et al.

Onitilo et al. BMC Medical Informatics and Decision Making 2014 14:38   doi:10.1186/1472-6947-14-38

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