- renal function: creatinine clearance greater than 60 mL/min/1.73m^2 or normal age adjusted serum creatinine (less than or equal to 5 yrs. less than or equal to 0.8 mg/ml; 5-10 yrs. less than or equal to 1.0 mg/ml; 10-15 yrs. less than or equal to 1.2 mg/ml; greater than 15 yrs. less than or equal to 1.5 mg/ml).