Table 2.

Predicted 24 h urinary Na and K by spot urine excretion stratified by gender.

Variable	Total (n=155)	Boys (n=80)	Girls (n=75)	p
Urinary Na/Cr (mmol)	18.16 ± 11.69	17.96 ± 10.01	18.36 ± 13.31	0.833
Urinary K/Cr (mmol)	2.77 ± 1.99	2.81 ± 1.98	2.73 ± 1.98	0.784
P24 h Na (mmol/d)	105.42 ± 66.05	105.72 ± 50.75	105.11 ± 79.55	0.406
P24 h Na (mg/d)	2424.77 ± 1519.09	2431.5 ± 1167.15	2417.58 ± 1829.75
P24 h K (mmol/d)	16.39 ± 12.57	17.37 ± 13.44	15.34 ± 11.55	0.764
P24 h K (mg/d)	639.15 ± 490.04	677.49 ± 524.32	598.25 ± 450.52
Urinary Na/K (mmol)	7.71 ± 4.02	7.84 ± 4.48	7.57 ± 3.48	0.963
Urinary Na/K (mg)	4.55 ± 2.37	4.63 ± 2.64	4.47 ± 2.05