Retrospective Analysis of Renal Prognosis in Patients With Chronic Kidney Disease

During 1993 and 2006, a total of 987 patients older than 20 years underwent native kidney biopsy at the Renal Division of this hospital. 404 patients with membranoproliferative glomerulonephritis and mesangioproliferative glomerulonephritis, and patients with secondary glomerulonephritis or other renal pathologies, such as diabetic nephropathy, lupus nephritis, rapid progress glomerulonephritis, acute tubular necrosis, and tubulointerstitial nephritis will be analyzed. The demographic characteristics and laboratory data of these patients at presentation or before renal biopsy will be recorded. These data included parameters such as age, sex, diabetes, hypertension, immunosuppressants treatment, BUN, serum creatinine, albumin, hemoglobin, total cholesterol, triglycerides, and urine protein. All subjects will be followed until 2015 for occurrence of primary endpoints, including all-cause death or ESRD requiring long-term dialysis or renal transplantation. A total of 433 patients who had been followed for 3 years during 2003 and 2007 will receive regular clinic follow-up. GFR will be estimated according to the Modification of Diet in Renal Disease (MDRD) abbreviated formula: 186 x Scr -1.154 x age -0.203 x 0.742 (if female). CKD stage will be determined as described by the National Kidney Foundation of the United States. At the time of entry, GFRs of 30-59, 29-15 and < 15 ml/min/1.73 m2 for more than 3 months will be classified as CKD stages 3, 4 and 5, respectively. Baseline Data of the 433 patients are used as recorded at the beginning during 2003 and 2007. The observation period of each patient is defined to start immediately after the registered measurement of serum creatinine satisfying the above criteria (designated as the index date) and lasted until ESRD or end of 2015. ESRD is defined as initiation of RRT, i.e. chronic dialysis or renal transplantation.