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Epidemiology of chronic kidney disease in type-2 diabetes patients: a descriptive population-based study

Galia ZACAY, Neora ALTERMAN, Yoel TOLEDANO, Noga FALLCH and Victor GROSS

Chronic kidney disease (CKD) is a common complication among individuals with diabetes, affecting approximately 30% of patients. Diabetes and CKD often co-exist with cardiovascular disease and with additional morbidities leading to increased healthcare needs.To characterize the population of Israeli adults with type 2 diabetes and describe the prevalence of CKD across its different disease stages, as well as to assess additional comorbidity. We further aimed to describe the pharmacological treatment and healthcare utilization patterns at each stage.A cross-sectional study based on medical records from one of Israel's national health maintenance organizations and including all current member aged 18 and above diagnosed with type 2 diabetes. CKD prevalence was determined based on estimated glomerular filtration rate (eGFR) and urinary albumin-to-creatinine ratio (uACR). We extracted demographic and clinical data, presence of comorbidities, information about medication use, specialist care and hospital visits.The study population included 65,349 adults with diabetes, of whom 29.7% had CKD; 18.9%, 6.2%, and 4.5% were at progressively more severe CKD stages. There was a positive association between CKD stage and various cardiovascular diseases, both before and after adjustments, the strongest of which was with heart failure reaching an adjusted relative risk of 2.5 (95% CI 2.3, 2.6) for the most severe stage compared to no CKD. Diabetic retinopathy and neuropathy were also positively associated with CKD stage reaching an adjusted relative risk of 2.1 (95% CI 2.0, 2.3) and 1.5 (95% CI 1.4, 1.5) respectively. Visits to Ophthalmologists were prevalent among more than half the population. Visits to Nephrologists, Endocrinologists, Cardiologists and Vascular surgeons were more common at more progressed CKD stages. Emergency room visits and hospitalization rates were also higher the more severe the CKD stage.CKD is prevalent among adults with diabetes type 2 in Israel and is associated with an increased burden of cardiovascular and other comorbidity. Healthcare utilization is higher at more severe CKD stages.The global rise in diabetes calls for improved prevention and care strategies as well as healthcare resource planning and allocation of services for the substantial subgroup of patients with comorbid CKD.