WCN25-1839 APPLYING SPOT URINE SODIUM TO POTASSIUM RATIO IN A STANDARDIZED SPOT URINE COLLECTION TO IMPROVE THE ACCURACY OF 24-HOUR URINE SODIUM EXCRETION ESTIMATION

High sodium intake has been a well-established risk factor for various chronic diseases including incident chronic kidney disease (CKD) and accelerated CKD progression. Limiting dietary sodium intake to less than 2,000 mg is recommended. Apart from the dietary recall, collecting 24-hour urinary sodium excretion (USE) could evaluate sodium intake in the preceding day. However, the collection is not convenient in clinical practice. Many formulae have been developed from spot urine collection to estimate USE, but the performances are relatively unsatisfactory.