[Causes and consequences of glycated hemoglobin variability on pediatric population].

Background: Type one diabetes mellitus is the second most frequent disease in childhood, presenting with serious complications when inadequately controlled. The most useful measure of metabolic control is hemoglobin A1c (HbA1c), being essential the awareness of the causes of its variability.

Aim: to evaluate the effect of age and time of disease on HbA1c; to evaluate the relationship between HbA1c and serum lipid and microalbuminuria values.