The overall mean ± SE (min-max range) of SCr, UCr, and GFR based on the enzyme method was 1.6 ± 0.2 mg/dL (1.1-2.1), 323 ± 59 mg/dL (184-457), and 1.10 ± 0.37 mL/min/kg BW (0.46-1.86).