The Canadian Diabetes Association has become Diabetes Canada*
Measure Fasting Plasma Glucose (FPG) and/or A1C and enter test results:
Or
Measure 75g Oral Glucose Tolerance Test (OGTT) and enter test results:
Rescreen as recommended, every 3 years.
Enter value for FPG and/or A1C; or OGTT only.
(Re)screen as recommended
Rescreen more often
The patient may have diabetes, suggest repeat A1C. If patient has symptoms of hyperglycemia, confirmatory / repeat test is not required, consider patient to have diabetes.
The patient may have diabetes, suggest repeat FPG. If patient has symptoms of hyperglycemia, confirmatory / repeat test is not required, consider patient to have diabetes.
Confirmatory test required. If patient has symptoms of hyperglycemia, confirmatory / repeat test is not required, consider patient to have diabetes.
Consider A1C test, rescreen more often
Requires second test for confirmation, consider repeat FPG and / or A1C test. If patient has symptoms of hyperglycemia, confirmatory / repeat test is not required, consider patient to have diabetes.
Consider FPG test, rescreen more often
Requires second test for confirmation, consider repeat A1C and / or FPG. If patient has symptoms of hyperglycemia, confirmatory / repeat test is not required, consider patient to have diabetes.
Review Clinical Practice Guidelines' Chapter 4: Screening for Type 1 and Type 2 Diabetes for more detailed information.
AIC, glycated hemoglobin; CV, cardiovascular; GDM, gestational diabetes; HDL-C, high density lipoprotein cholesterol; HIV, human immunodeficiency virus-1; IFG, impaired fasting glucose; IGT, impaired glucose tolerance.
Conditions that lead to misleading A1C include: hemoglobinopathies, hemolytic anemia, iron deficiency, severe renal or liver disease. Link to Table 1, Monitoring for Glycemic Control.
See Individualizing Your Patient’s A1C target, Chapter 9: Monitoring Glycemic Control, Table 1
Click here to view the Canadian Diabetes Risk Questionnaire (CANRISK) (printable and downloadable version)
Click here to view the Canadian Diabetes Risk Questionnaire (CANRISK) interactive online questionnaire
Chapter 4: Figure 1. Screening and diagnosis algorithm for type 2 diabetes.
*The Canadian Diabetes Association is the registered owner of the name Diabetes Canada. All content on guidelines.diabetes.ca, CPG Apps and in our online store remains exactly the same. For questions, contact communications@diabetes.ca.