Figure 2: Changes in the HbA1c levels for the EDTA- (white bar) and heparinanticoagulated (black bar) blood samples. The data are the mean and SD for 15 non-diabetic dogs. An unpaired, 2-tailed Student’s t-tests was used to compare the HbA1c values between each anticoagulated blood sample and time point. The P values <0.05 and <0.01 were considered significant and highly significant, respectively.