Table 2. Predicted 24-hour urine sodium and potassium excretion.

	Male (n = 190)	Female (n = 325)	P-value*
SUCr (mg/dL)	177 ± 99	123 ± 63	< 0.001
PRCr (mg/day)	1525 ± 252	1061 ± 180	< 0.001
SUNa (mEq/L)	139 ± 49	135 ± 49	0.355
SUNa/SuCr × PRCr	155 ± 105 (5–956)	150 ± 41 (3–599)	0.890
PRNa (mEq/day)	152 ± 39 (41–324)	150 ± 41 (34–270)	0.712
SUK (mEq/L)	82 ± 31	82 ± 42	0.977
SUK/SUCr × PRCr	81 ± 39 (22–384)	78 ± 39 (13–417)	0.521
PRK (mEq/day)	49 ± 9 (29–99)	48 ± 9 (23–102)	0.399
PRNa/K	2.83 ± 0.62	2.85 ± 0.70	0.732

SUCr, spot urine creatinine; SUNa, spot urine sodium; SUK, spot urine potassium; PRCr, predicted 24-hour urine creatinine value; PRNa, predicted 24-hour urine sodium value; PRK, predicted 24-hour urine potassium value; PRNa/K, predicted PRNa/K ratio.