Fig. 2
HbA1c violin plot and FPG-HbA1c distribution plot. a Violin plot showing the distribution and mean (SD) HbA1c by ethnicity. b Distribution of fasting plasma glucose (FPG) values during oral glucose tolerance test plotted against HbA1c. Red circles = South Asian women, and blue triangles = Nordic women. Solid line = ADA criteria for prediabetes (FPG 5.6–6.9 mmol/L, and/or HbA1c 39–47 mmol/mol (5.7–6.4%)), dotted line = WHO-IEC criteria for prediabetes (FPG 6.1–6.9 mmol/L and/or HbA1c 42–47 mmol/mol (6.0-6.4%)), and dashed line = criteria for diabetes (FPG ≥ 7.0 mmol/L and/or HbA1c ≥ 48 mmol/mol (≥ 6.5%))