Type 2 diabetes mellitus in children and adolescents in the world and in Ukraine

Introduction. Recently, many studies have been devoted to the study of type 2 diabetes mellitus (DM2) worldwide. In most countries of the world, the increase in the prevalence of DM2 among children and adolescents is accompanied by an increase in childhood obesity. The presence of obesity or overweight in children can complicate the diagnosis of various types of DM. Detection and treatment of DM2 is extremely important for the society due to the wide range of severe diabetes complications.The aim of this work was to analyze the frequency of DM2 according to the Register of patients with DM, and to determine the state of glycemic control in children with DM2. Materials and methods. An analysis of glycemic control in children with DM2 who received various treatment regimens: with diet and lifestyle modifications, or with additional oral hypoglycemic agents (metformin monotherapy, or combination with insulin therapy). The glycemic control was assessed by measurement of glycated hemoglobin (HbA1c) level. Results. According to the data Register in Ukraine, the prevalence of DM among children has a tendency to rise — from 8.6 per 10 thousand children in 2005, to 13.14 — in 2019 year. The prevalence of DM2 in 2019 was 0.47 % of all cases of DM, and its prevalence contained 0.062 per 10 thousand children under 19 years of age with significant differences in the frequency of its diagnosis in different regions of Ukraine. We analyzed the state of glycemic control in children with DM2 aged from 9 up to 19 years old (Me 16.2 [15.5; 18.0]), with a  disease duration 0.5—12 years (Me 4.5 [1.0] ; 7.5]). The age of diagnosis of DM2 was 2-17 years old (Me 11.7 [8.5; 15.0]), and 91.3 % of patients had obesity. Diet and lifestyle modifications were used in 34.8 % of patients, metformin monotherapy in 52.2 %, and metformin and insulin combination therapy in 13 % of patients. HbA1c values ​​ranged from 5.0 to 11.4 % (Me 7.2 % [5,8; 8,0]). The proportion of children who had ideal or optimal glycemic control (HbA1c 7.0—7.5 %) was 52.2 %, suboptimal (HbA1c 7.6—9.0 %) — 39.1 %, high-risk glycemic control (HbA1c> 9.1 %) — 8.7 % of children. The most unsatisfactory HbA1c levels ​​were registered in children who received metformin in combination with insulin (Me 10.6 % [10,15; 11,4]). Chronic complications of DM2 have not been reported.Conclusions. We found a low prevalence of DM2 among the pediatric population in Ukraine, more likely due to the low quality of its detection among children diagnosed with DM, as well as among children among high risk groups. Most children with DM 2 were obese. The majority of patients with DM2 (52.2 %) received metformin monotherapy, more than a third did not receive oral hypoglycemic agents. In most children with DM2 (52,2 %), the state of glycemic control corresponded to the optimal (< 7.5 %), but higher levels of HbA1c were found children who received metformin in combination with insulin.