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Background and Aims The cause of chronic kidney disease (CKD) is one of important factors for predicting the outcome. However, relative risks for the adverse outcomes according to the specific causes of CKD is unknown. Method Using the longitudinal data of prospective cohort of Korean predialysis CKD, KNOW-CKD cohort, the relative risk of end-stage renal disease (ESRD), composite of ESRD development or creatinine doubling, and composite of cardiovascular disease (CVD) and all-cause mortality according to the cause of CKD were compared. The patients were subgrouped in to four categories at the study entry according to the cause of CKD: glomerulonephritis (GN), diabetic nephropathy (DN), hypertensive nephropathy (HTN), and polycystic kidney disease (PKD). Since the baseline characteristics differed according to the causes of CKD, the inverse probability of treatment weighting (IPTW) methods was used to exclude the effects of other variables on the outcomes. The estimated glomerular filtration rate (eGFR) slope during follow-up was calculated for each cause of CKD using linear mixed model Results During the median follow-up of 4.1 years (interquartile range 1.12-7.12 years) total 441 (21.5%) of ESRD, 556 (27.1%) of composite of ESRD or creatinine doubling and 190 (9.3%) composite of CVD and all cause death occurred. In the IPTW adjusted cohorts, DN and PKD showed significantly increased hazard ratios of 1.85 and 5.57 for ESRD development and 1.74 and 4.57 for composite of ESRD developement or creatinine doubling, respectively, compared to GN in the fully adjusted model. Regarding compsite of CVD and all-cause death, also DN and PKD showed significantly increased hazard ratios of 1.93 and 2.16 compared to GN. The adjusted eGFR slope for DN, HTN and PKD was -2.32, -0.90, and -2.41 mL/min/1.73m2 per year, respectively, and all differ statistically significantly compared to GN (eGFR slope of -1.49 mL/min/1.73m2 per year). During the follow-up, GN and DN showed linear declining pattern however, HTN and PKD showed convex linear pattern. Conclusion The DN and PKD showed relatively higher risks for renal progression and composite of CVD and death compared to GN.

P0795OUTCOME COMPARISON STUDY ACCORDING TO THE CAUSE OF CHRONIC KIDNEY DISEASE: RESULTS FROM KNOW-CKD STUDY