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

Harris et al. BMC Health Services Research 2010 10:347   doi:10.1186/1472-6963-10-347

Open Data