Correction

Witzel SH, Huang SH, Braam B, Filler G. Estimation of GFR using β-trace protein in children. Clin J Am Soc Nephrol 10: 401–409, 2015.

Because of author error, incorrect units for creatinine in the formulas appeared within the abstract and Table 1. The units were incorrectly reported as milligrams per liter instead of as milligrams per deciliter. Additionally, the authors did not explicitly indicate that the base for the logarithmic transformation was 10. To circumvent the use of logarithms and provide interpretation to the constant multipliers, the equations should be re-expressed asandwhere for a child with a β-trace protein (BTP) of 0.7 mg/L, a creatinine (Cr) of 0.7 mg/dl, and a height of 140 cm, the eGFR of a boy would be 110.04 ml/min per 1.73 m² and the eGFR of a girl would be 103.10 ml/min per 1.73 m².

The authors thank Alvaro Muñoz from the Chronic Kidney Disease in Children Cohort Study (CKiD) data center at Johns Hopkins University for helping to identify these errors.