Prediabetes and atrial fibrillation risk stratification, phenotyping, and possible reversal to normoglycemia

Table 1 Diagnosis of stress hyperglycemia, prediabetes, and diabetes mellitus

Character	Stress hyperglycemia	Prediabetes	Diabetes
History	No history of diabetes or prediabetes	No history of diabetes	Known case of diabetes or confirmed by diabetes based on blood glucose and HbA1c
Blood tests	Fasting blood glucose of > 6.9 mmol/L, random blood glucose > 11.1 mmol/L that reverse to normal after hospital discharge	Fasting blood glucose: 5.6-6.9 mmol/L, 2 hours after a 75 g oral glucose tolerance: 7.8-11.1 mmol/L, and HbA1c: 5.8-6.4	Fasting blood glucose of > 6.9 mmol/L, random blood glucose > 11.1 mmol/L during hospital stay and confirmed after discharge, and HbA1c ≥ 6.5

HbA1c: Glycated hemoglobin.