BACKGROUND: Autosomal dominant polycystic kidney disease (ADPKD) is the most common hereditary renal disease. The course and progression of the disease is highly variable. In this study, we aimed to investigate the impact of clinical characteristics and basic biochemical parameters on progression of chronic kidney disease (CKD) in ADPKD patients. MATERIALS AND METHODS: A total of 323 consecutive patients with ADPKD were enrolled into the study and followed with a mean duration of 100 ± 38 months. Patients were grouped as rapid progressors (RP) and slow progressors (SP) according to median rates of decline in glomerular filtration rate (ΔGFR) per year, namely 1 ml/min/year. RESULTS: History of macroscopic hematuria, urinary stone and smoking were more common in male patients; hepatic and other organ cysts were more common in female patients. ∆GFR/year was similar between males and females [0.95 (0-3.02) vs. 1.11 (0.10-2.74) ml/min/year, p = 0.21]. History of smoking and pack-year of cigarettes smoked were significantly higher in the RP compared to the SP group (36 vs. 18%, p = 0.01 and 5.24 ± 1.20 vs. 3 ± 1.32 pack-year, p = 0.02, respectively). Baseline 24 h-proteinuria was found to be significantly correlated with the percent decline of GFR (∆%GFR) per year (r = 0.303, 0.001). In Cox regression analysis for predicting the progression of CKD, age, hypertension, urinary stone and proteinuria were retained as the significant independent factors predicting progression of CKD in the model. CONCLUSION: Baseline proteinuria was significantly correlated with ∆%GFR per year. Hypertension and proteinuria were found to be the major treatable risk factors for the progression of CKD in ADPKD patients.
BACKGROUND:Autosomal dominant polycystic kidney disease (ADPKD) is the most common hereditary renal disease. The course and progression of the disease is highly variable. In this study, we aimed to investigate the impact of clinical characteristics and basic biochemical parameters on progression of chronic kidney disease (CKD) in ADPKDpatients. MATERIALS AND METHODS: A total of 323 consecutive patients with ADPKD were enrolled into the study and followed with a mean duration of 100 ± 38 months. Patients were grouped as rapid progressors (RP) and slow progressors (SP) according to median rates of decline in glomerular filtration rate (ΔGFR) per year, namely 1 ml/min/year. RESULTS: History of macroscopic hematuria, urinary stone and smoking were more common in male patients; hepatic and other organ cysts were more common in female patients. ∆GFR/year was similar between males and females [0.95 (0-3.02) vs. 1.11 (0.10-2.74) ml/min/year, p = 0.21]. History of smoking and pack-year of cigarettes smoked were significantly higher in the RP compared to the SP group (36 vs. 18%, p = 0.01 and 5.24 ± 1.20 vs. 3 ± 1.32 pack-year, p = 0.02, respectively). Baseline 24 h-proteinuria was found to be significantly correlated with the percent decline of GFR (∆%GFR) per year (r = 0.303, 0.001). In Cox regression analysis for predicting the progression of CKD, age, hypertension, urinary stone and proteinuria were retained as the significant independent factors predicting progression of CKD in the model. CONCLUSION: Baseline proteinuria was significantly correlated with ∆%GFR per year. Hypertension and proteinuria were found to be the major treatable risk factors for the progression of CKD in ADPKDpatients.
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