Spot urinary sodium in CKD patients: correlation with 24h-excretion and evaluation of commonly used prediction equations

  • Published on 07/10/2024
  •  Reading time: 6 min.

Kurzhagen Johanna T. 1, Titze Stephanie 1,2, Büschges-Seraphin Beatrix 3, Schiffer Mario 1, Schneider Markus P. 1, Eckardt Kai-Uwe 1,4, Hilgers Karl F. 1

1 Department of Nephrology and Hypertension University of Erlangen-Nuremberg, Medizinische Klinik 4, Universitätsklinikum Erlangen Erlangen Germany
2 Kassenärztliche Bundesvereinigung Berlin Germany
3 KfH Fürth, Nephrology and Hypertension Fürth Germany
4 Department of Nephrology and Medical Intensive Care Charité – University Medicine Berlin Berlin Germany


Background Salt intake in CKD patients can affect cardiovascular risk and kidney disease progression. Twenty-four hour (24h) urine collections are often used to investigate salt metabolism but are cumbersome to perform. We assessed urinary sodium (U-Na) concentration in spot urine samples and investigated the correlation with 24h U-Na excretion and concentration in CKD patients under nephrological care. Further, we studied the role of CKD stage and diuretics and evaluated...


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