Study Flow Diagram. Note. HbA1c = Glycated hemoglobin; POC-cHbA1c = Point-of care capillary HbA1c; vHbA1c = venous HbA1c; OGTT = Oral glucose tolerance test; DM = Diabetes mellitus; IFG = Impaired fasting glucose; IGT = Impaired glucose tolerance. 1 In total, 330 enrolled patients agreed to proceed to POC-cHbA1c screening, yet one patient refused to undergo POC-cHbA1c testing later. 2 In total, 190 enrolled patients agreed to proceed to vHbA1c screening, yet 33 patients refused to undergo vHbA1c testing due to personal circumstances. * Point-of care capillary HbA1c testing for intervention; venous HbA1c testing for control. Cases with missing data are removed from the analysis. Normal HbA1c concentration refers to HbA1c < 5.6%. High-risk HbA1c concentration refers to HbA1c 5.6%. || DM refers to fasting glucose 7.0 mmol/L and/or 2-h post-challenge plasma glucose concentration (2 h PG) 11.1 mmol/L according to the American Diabetes Association. IFG (impaired fasting glucose) refers to fasting glucose between 5.66.9 mmol/L, and IGT (impaired glucose tolerance) refers to 2 h PG between 7.811.0 mmol/L according to the American Diabetes Association
