Laboratory Test Information Guide

Details for Glycated Hemoglobin

Test Name: Glycated Hemoglobin
Alternate Name(s): Hemoglobin A1c
Laboratory: Core
Specimen Type: 4 mL K2 or K3 EDTA Lavender top Vacutainer tube

0-2 years: 0.5 mL Lavender top Microtainer
2-10 years: 3 mL Lavender top tube
Collection Information: Collect blood aseptically in a Vacutainer tube.
Test Schedule: As required
Turnaround time from when specimen
is received in testing laboratory:
4 hours
Reference Range: Non-diabetic: <6.0%
Prediabetes: 6.0% - 6.4%
Diabetes: > or = 6.5%
Target levels for Type1 and Type 2 Diabetes: < or =7%
Effective Date: 2010-06-28
Revised Date: 2018-10-11
Critical Value:  
Interpretive Comments: Screening and Diagnosis of Type 2 Diabetes

HbA1c Result (%)Dysglycemia Category
5.5-5.9At Risk

Therapeutic Targets

Adults Results (%)Targets
Less than or = 6.5Adults with type 2 diabetes to reduce the risk of CKD and retinopathy if at low risk of hypoglycemia
Less than or = 7.0Most adults with type 1 or type 2 diabetes
7.1-8.5- Recurrent severe hypoglycemia and/or hypoglycemia unawareness
- Limited life expectancy
- Frail elderly and/or with dementia
Paediatrics Results (%)Targets
Less than or = 7.0Most children with type 2 diabetes
Less than or = 7.5Most children with type 1 diabetes

*2018 CDA Guidelines. For more details please visit
Special Processing:  
Comments: HbA1c measurement is an index of the integrated plasma glucose values over the past 6-8 weeks, which is not subject to the fluctuations observed in blood glucose concentrations.
Therefore we will cancel duplicates as "HbA1c already tested within 6 wks".
Method of Analysis: Turbidimetric inhibition immunoassay (TINIA)
Critical Information Required:  
Storage & Shipment:  
System Codes: 
Referred To:  

Questions? Comments? Contact Laura Gopaul