International urology and nephrology · 2012
Hyperphosphatemia is associated with overt proteinuria in non-diabetic patients with late-stage chronic kidney disease: a cross-sectional study.
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Yap Yit-Sheung, Chi Wen-Che, Lin Cheng-Hao, Wu Yi-Wen, Liu Yi-Chun
Аннотация
PURPOSE: Proteinuria plays an important role in the progression of chronic kidney disease (CKD), as well as a powerful predictor of cardiovascular morbidity and mortality. The aim of our study was to investigate the potential determinants associated with overt proteinuria in non-diabetic patients with late-stage CKD.
METHODS: Between January 2006 and September 2011, a total of 418 non-diabetic patients with CKD stage 3-5 were enrolled from the outpatient department of nephrology. Urinary protein-to-creatinine ratio and serum phosphorus were determined. Other laboratory parameters, associated comorbidities, medication use, body mass index, and blood pressure were also assessed.
RESULTS: The mean age of the patients was 66.7 ± 14.0 years. In multiple logistic regression analysis and adjusting for established risk factors, the odds ratios for overt proteinuria were 3.96 (95 % confidence interval, 1.80-8.76; p = 0.001) for higher serum phosphorus level (≥4.3 mg/dl) and 3.56 (95 % confidence interval, 1.47-8.63; p = 0.005) for hypercholesterolemia (≥217 mg/dl), compared to subjects with serum phosphorus <3.3 mg/dl and cholesterol level 158-184 mg/dl. The similar significant findings remained robust in individuals not receiving phosphate binder.
CONCLUSIONS: Hyperphosphatemia and high serum cholesterol are associated with overt proteinuria in non-diabetic patients with late-stage CKD. Further studies should clarify whether this relation is causal and whether serum phosphorus level should be a new therapeutic target for proteinuria reduction.
METHODS: Between January 2006 and September 2011, a total of 418 non-diabetic patients with CKD stage 3-5 were enrolled from the outpatient department of nephrology. Urinary protein-to-creatinine ratio and serum phosphorus were determined. Other laboratory parameters, associated comorbidities, medication use, body mass index, and blood pressure were also assessed.
RESULTS: The mean age of the patients was 66.7 ± 14.0 years. In multiple logistic regression analysis and adjusting for established risk factors, the odds ratios for overt proteinuria were 3.96 (95 % confidence interval, 1.80-8.76; p = 0.001) for higher serum phosphorus level (≥4.3 mg/dl) and 3.56 (95 % confidence interval, 1.47-8.63; p = 0.005) for hypercholesterolemia (≥217 mg/dl), compared to subjects with serum phosphorus <3.3 mg/dl and cholesterol level 158-184 mg/dl. The similar significant findings remained robust in individuals not receiving phosphate binder.
CONCLUSIONS: Hyperphosphatemia and high serum cholesterol are associated with overt proteinuria in non-diabetic patients with late-stage CKD. Further studies should clarify whether this relation is causal and whether serum phosphorus level should be a new therapeutic target for proteinuria reduction.