Fig. 3: Bland-Altman analyses for HbA1c measurements with different blood types.

Shown in each graph is the TSB POC method using capillary blood (a) or venous blood (b) compared to the reference standard. The performance of the TSB POC method when comparing venous and capillary blood samples on the TSB POC is shown in (c). Accordingly, in (c) the TSB POC method with venous blood represents the reference. Grey zone: 95% limit of agreement area.