There was a statistically significant difference between the group of patients with poor blood sugar control (HbA1c ≥ 7.5) and the good blood sugar control group (HbA1c < 7.5) (18.93 ± 0.97 và 29.15 ± 0.99; p < 0.001), there was also a statistically significant difference between the hypertensive and nonhypertensive groups (p <0.001).