Table 1.
Number of patients diagnosed with diabetes (true positives between linked health administrative-EMR dataset) and associated crude prevalence rates categorized by diabetes definition
| Definition | # Patients with Diabetes | Crude Prevalence % |
|---|---|---|
| 1. Base Definition: ≥2 plasma glucose testsa OR insulin OR ≥2 oral anti-diabetic drugs | 975 | 5.0 |
| a. Base OR HbA1c ≥6.5% | 1515 | 7.8 |
| b. Base OR diabetes on problem list | 1905 | 9.8 |
| c. Base OR HbA1c ≥6.5% OR diabetes on problem list | 2180 | 11.2 |
| d. Base OR HbA1c ≥6.5% OR diabetes on problem list; Limit base definition to ≥1 oral anti-diabetic drugs | 2329 | 12.0 |
| e. Base OR HbA1c ≥6.5% OR diabetes on problem list; Limit base definition to ≥1 oral anti-diabetic drugs OR ≥1 plasma glucose tests | 2329 | 12.0 |
| 2. Registry: ≥2- ICD 250 codes AND ≥1 HbA1c lab value | 1586 | 8.2 |
| 3. ODD: one hospitalization discharge with a diagnostic code for diabetes (ICD9 250) OR two physician service claims with a diagnosis recorded for diabetes (ICD8 250) within a 2-year period | 1935 | 10.0 |
aPlasma glucose tests include: fasting plasma glucose ≥ 7.0 mmol/L; casual plasma glucose ≥ 11.1 mmol/L; 2-hour plasma glucose in a 75-g oral glucose tolerance test ≥ 11.1 mmol/L