Trends in the epidemiology of chronic kidney disease in patients with diabetes in Russian Federation according to the Federal diabetes register (2010–2022)

BACKGROUND: Chronic kidney disease (CKD) in diabetes mellitus (DM) is a supranosological concept that characterizes multifactorial kidney damage associated with increased cardiovascular and mortality risk, which determines the high medical and social significance of this problem in diabetic patients.AIMS: To assess the clinical and epidemiological characteristics of CKD in adult DM patients with type 1(T1) and type 2 (T2) in Russian Federation (RF) in 2010–2022 according to the Federal Register of Diabetes Mellitus (FDR) and to present the capabilities of the register’s analytical tools for assessing organ-protective therapy and predicting the risk of pathology.MATERIALS AND METHODS: We have used the database of FRD (http://diaregistry.ru), 85 regions of the RF. The data are presented as of 01.01.2023 and in dynamics for the period 2010–2022.RESULTS: The CKD prevalence in adult DM patients in RF in dynamics 2010→2022 showed in an increase in the rate for T1 from 21.5 to 27.1% (1.3 times), for T2 from 5.2 to 19.1% (3.7 times). The incidence of new CKD cases was 153.3→106.3/10 000 adult patients in T1, and 64.3→212.8/10 000 adult patients in T2. The analysis of the distribution by CKD stage indicates improved diagnosis of the complication. In the structure of new cases of CKD in the dynamics of 2010→2022. The proportions of patients with low and moderate combined risk of cardiovascular events and end-stage renal failure according to KDIGO criteria increased for T1 63.7→82.4%, for T2 64.5→77.4%. The proportions of patients with very high risk progressively decreased for T1 12.3→4.0%, for T2 13.1→1.6%. The average age of onset of CKD increased by an average of 6 years in persons with type 1 and type 2 diabetes (35.6→42 years, 63.3→69.3 years, respectively), with the dynamics of the average DM duration at the time of CKD development: in T1 11.5→14.8 years, in T2 7.4→7.8 years. The cause of terminal CKD in the structure of mortality in DM patients took only in T1 patients 5.6% and in T2D — 2.0%. A retrospective analysis of factors influencing the fatal outcome of DM patients with COVID-19 showed the significance of a history of CKD in T2DM patients, which increases the risk of death by 1.49 times (95% CI 1.01–2.04). Analysis of the structure of glucose-lowering therapy in T2DM patients and CKD indicates a more frequent prescription of drugs from the group of SGLT-2 inhibitors, DPP-4 inhibitors, and GLP-1 receptor antagonists compared to the general cohort of T2DM. There is the CKD prognosis calculator in the FRD, which allows assessing the risk of developing of pathology within 5 years in a particular patient based on a set of the most significant predictors, which included 6 factors for T1 and 11 factors for T2. CONCLUSIONS: Epidemiological trends in the prevalence of CKD over a 13-year period indicate the growing importance of this problem in DM patients who are at risk. Along with the positive trends in the development of pathology  with a longer duration of diabetes, in clinical practice the problem remains of untimely detection of CKD with impaired renal function at advanced stages. The progressive nature of the course and the negative impact of kidney damage on the risks of premature mortality in patients determine the priority of preventive diagnostic  and therapeutic strategies aimed at compliance with the standard of examination, detection of pathology in the early stages and a multifactorial approach to nephroprotection, according to clinical recommendations.