Real Clinical Practice Register of AlbUminuRia Detection in Patients With Previously undiAgnosed Chronic Kidney Disease

Inclusion Criteria: * Men and women aged 40 and older at the time of data entry; * A possibility to check for albuminuria using dipsticks and/or analysis for microalbuminuria or albumin-to-creatinine ratio in a single urine sample. Exclusion Criteria: * Unwillingness of the patient to participate in the register; * Diagnosis of CKD made before the screening for the register; * Diagnosis of diabetes mellitus (DM) type 1 or type 2 made before the screening for the register; * Pregnancy; * Long distance running or very strenuous physical activity in the last 24 hours.