The risk of diabetes incidence based on the baseline HbA1c levels in the Cox proportional-hazard model.

*Actual person-years in each HbA1c group were 142,029, 34,614, 16,277, 7,718, 3,923, and 1,447.†Adjusted for age (≤60,60–69, ≥70), sex, body mass index (BMI), hypertension, family history of diabetes, exercise habit, smoking habit, heavy alcohol consumption. The p values of interaction terms were 0.07, 0.37, 0.49, 0.62 and 0.14 for (HbA1c x age), (HbA1c × sex), (HbA1c × BMI), (HbA1c × hypertension), and (HbA1c × smoking habit), respectively.95% CI: 95% confidence interval; HbA1c: hemoglobin A1cThe risk of diabetes incidence based on the baseline HbA1c levels in the Cox proportional-hazard model.