The Original Investigation entitled “Kidney Injury and Repair Biomarkers in Marathon Runners” that appeared in the August 2017 issue of AJKD (Mansour et al, volume 70, issue 2, pages 252-261) contained an error in Table 3. Specifically, the values given for urine albumin-creatinine ratio were inadvertently given in milligrams of albumin per milligram of creatinine instead of milligrams of albumin per gram of creatinine, which were the units that were listed. In its corrected form, the row in question (with column headings provided for clarity) is as follows: