NPPB and kidney disorder: The median of NT-proBNP levels, eGFR (Modification of Diet in Renal Disease [MDRD] Study) equation dosages, creatinine concentrations and serum potassium at baseline were 1865 ± 2318 pg/mL, 69.4 ± 23.1 mL/min/1.73 m2, 1.2 ± 0.35 mg/dL, 4.14 ± 0.44 mEq/L respectively.