Figure 4From: Estimation of salt intake from spot urine samples in patients with chronic kidney disease Accuracy and precision of estimates expressed as P30 and IQR categorized by eGFR. Highest accuracy within 30% and lowest precision were found for samples with an eGFR <30 mL/min. P30: percentage of estimated sodium intake within 30% of measured sodium intake, IQR: interquartile rangeBack to article page