Table 1 Scope of data collected for the KIND registry

First section: Demographic/ anthropometric/ medical history characteristics

 Date of birth, sex, occupation, region within Saudi Arabia, height, weight, and Body mass index (BMI). Medical history included: status of diabetes mellitus, hypertension, and coronary artery disease

Second section: Glomerulonephritis patients

 Biopsy diagnosis, history of symptoms, systolic and diastolic blood pressure, urine analysis, creatinine, glomerular filtration rate (GFR), Albumin-to-Creatinine ratio (ACR), Protein-Creatinine Ratio (PCR), 24 h protein, Serum Albumin, Anti–glomerular basement membrane (anti-GBM), Antineutrophil cytoplasmic autoantibodies (ANCA), Antinuclear antibodies (ANA), Anti-double stranded DNA (Anti-dsDNA), Complement levels (C3&C4), Viral serology (HBV, HCV and HIV), Cryoglobulin level, erythrocyte sedimentation rate (ESR), Rheumatoid Factor (RF), Hematuria, family history of Glomerulonephritis, and medication history

Third section: Transplanted patients

 Details of the transplant, hourly urine at the date of transplant, kidney function indicators after transplant, hospitalization, infections, the occurrence of malignancies, cardiovascular diseases, or pregnancy

Fourth section: Patients on dialysis

 History of dialysis treatment, frequency and duration of dialysis sessions, eGFR, type of HD method (high/low flux), type of peritoneal dialysis (continuous ambulatory or cyclic PD, nocturnal intermittent PD), Urea Reduction Ratio, Kt/V rate, Residual renal function, organisms isolated during dialysis

Fifth section: Laboratory measurements

 White blood cells (WBC), Hemoglobin, Platelets, Serum Iron, Ferritin, Urine RBC, Urine Pus, Urine protein, Urine PCR, Fasting Blood sugar, Urea, Potassium, Sodium, corrected Calcium, Phosphate, Parathyroid hormone (PTH), C-Reactive Protein, Ultra-Sound information: size and echogenicity of kidneys

Sixth section: Follow-up data

 Patient status, cause of death, loss-to-follow-up

Keywords used to identify patients: Glomerulonephritis, Hemodialysis, Peritoneal dialysis, Renal transplant, Kidney transplant, chronic kidney disease