To evaluate the variability of glicemic control in diabetic patients followed during one year, we conducted a retrospective study in which the record data of 113 diabetic patients were analyzed. The value of HBA1c (glycated hemoglobin) measured during a year were registered and an index of glicemic control was calculated. This index was associated with duration of diabetes, BMI and dose of insulin. HBA1c were higher in type 1 diabetes than type 2, respectively, [7.9 (4.4-13.3) vs. 7.0 (4.4-13.4)%; p= 0.007]. In 90 patients with at least two HBA1c measurements, 68 (75.6%) had no change in glicemic control: 51 (76.1%) had good, 8 (11.1%) regular and 9 (11.9%) poor control. None of them sustained all the HBA1c in the normal range: 26 (28.9%) had at least one normal HBA1c value. In general group, 44 patients (48.9%) showed increase, 41 (45.6%) decreased and 5 (5.6%) remained with the same level of HBA1c, without difference between DM1 and DM2 (p= 0,77). A difference in HBA1c and diabetes duration among patients with DM2 treated with diet, oral hipoglycemic agents, combined therapy and monotherapy with insulin, was noted respectively (5.4±0.5 vs. 6.3±1.3 vs. 7.6±1.4 vs. 8.4±2.0%; p= 0.001) and (8.5±9.9 vs. 5.3±4.2 vs. 14.1±9.6 vs. 16.9±8.1 years; p= 0,003). The intraindividual coefficient of variation of HBA1c was 11.6±7.4% (p= 0.0000) being 12.8±7.6 (p= 0.0000) in type 1 and 10.4±7.2% in type 2 (p= 0.0000) without difference between both groups. In conclusion: the majority of the patients in our study maintained a good control despite the intraindividual variability of HBA1c and the difficulty to keeping it in the normal range.
Glicemic control; Variability glycated hemoglobin; Diabetes type 1; Diabetes type 2
