BACKGROUND: Renal impairment (RI) has been shown to be one major risk factor in a number of diseases and is associated with a dismal clinical outcome. However, the influence of milder degrees of renal disease is less well defined, particularly not in patients with malignant diseases. PATIENTS AND METHODS: We analyzed 167 patients with solid tumors and hematological malignancies. Besides disease-specific parameters, serum creatinine, cystatin C and the estimated glomerular filtration rate (eGFR) ['modification of diet in renal disease' equation (MDRD)/Cockcroft-Gault (CG)] were determined. Patients were compared within eGFR, creatinine and cystatin C groups. RESULTS: The median MDRD, CG, creatinine and cystatin C levels of all patients were 88 ml/min/1.73 m2, 89 ml/min, 1 mg/dl and 0.9 mg/l, respectively. Patients with chronic kidney disease stage 2 still showed normal creatinine and cystatin levels of 1 mg/dl and 1.1 mg/l, respectively, although mild RI was frequent. Those cancer patients with decreased eGFR (MDRD) (<60 ml/min/1.73 m2) had increased odds ratios (ORs) to have more concurrent diagnoses [OR 3.4; 95% confidence interval (CI) 1.5-8.1], a body mass index >24 kg/m2 (OR 2.1; 95% CI 1.0-4.5) and an elevated (> 245 pg/ml) pro-brain natriuretic peptide level (proBNP) (OR 9.2; 95% CI 3.0-28.3). CONCLUSIONS: These observations suggest that grouping cancer patients according to renal function, especially eGFR, may be one way to determine specific risk groups.
BACKGROUND:Renal impairment (RI) has been shown to be one major risk factor in a number of diseases and is associated with a dismal clinical outcome. However, the influence of milder degrees of renal disease is less well defined, particularly not in patients with malignant diseases. PATIENTS AND METHODS: We analyzed 167 patients with solid tumors and hematological malignancies. Besides disease-specific parameters, serum creatinine, cystatin C and the estimated glomerular filtration rate (eGFR) ['modification of diet in renal disease' equation (MDRD)/Cockcroft-Gault (CG)] were determined. Patients were compared within eGFR, creatinine and cystatin C groups. RESULTS: The median MDRD, CG, creatinine and cystatin C levels of all patients were 88 ml/min/1.73 m2, 89 ml/min, 1 mg/dl and 0.9 mg/l, respectively. Patients with chronic kidney disease stage 2 still showed normal creatinine and cystatin levels of 1 mg/dl and 1.1 mg/l, respectively, although mild RI was frequent. Those cancerpatients with decreased eGFR (MDRD) (<60 ml/min/1.73 m2) had increased odds ratios (ORs) to have more concurrent diagnoses [OR 3.4; 95% confidence interval (CI) 1.5-8.1], a body mass index >24 kg/m2 (OR 2.1; 95% CI 1.0-4.5) and an elevated (> 245 pg/ml) pro-brain natriuretic peptide level (proBNP) (OR 9.2; 95% CI 3.0-28.3). CONCLUSIONS: These observations suggest that grouping cancerpatients according to renal function, especially eGFR, may be one way to determine specific risk groups.
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