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Table 3 Twenty-four hour urine sodium predicting equation

From: Development and double cross-validation of new spot urine sodium equation to predict 24-h urine sodium in the Malaysian population

Predicting equation 909.368 + 24.052 (weight in kg) − 0.11 (age2 in year) + (538.38 if male) + 0.269 (spot sodium in mg/L) − 5.469 (spot creatinine in mg/dL) + 5.541 (spot potassium in mmol/L)
Parameters β SE P value
Weight 0.297 2.674 < 0.001
Age2 − 0.138 0.026 < 0.001
Male 0.227 78.053 < 0.001
Spot sodium (mg/L) 0.94 0.032 < 0.001
Spot creatinine (mg/dL) − 0.32 0.703 < 0.001
Spot potassium (mmol/L) 0.153 1.301 < 0.001