Correction

Biff F. Palmer and Deborah Joy Clegg: The Use of Selected Urine Chemistries in the Diagnosis of Kidney Disorders. Clin J Am Soc Nephrol 14: 306–316, 2019; DOI: https://doi.org/10.2215/CJN.10330818.

The parameters utilized in Figure 4 (below) to distinguish appropriate potassium retention versus increased potassium excretion by the kidney (13 mEq K⁺/g creatinine, 2.5 mEq K⁺ /mmol creatinine) are two different thresholds reported in the literature and are not meant to indicate mathematical equivalence.

Figure 4.

A flow diagram for the approach to patients with hypokalemia on the basis of the potassium-to-creatinine ratio in the urine. RTA, renal tubular acidosis.