TABLE 3.

Distributions of total urine volume and 24-h excretion of sodium, potassium, chloride, creatinine, and iodine in the d 1 collection¹²

		Percentile
	Means ± SDs	25th	50th	75th
Total volume, mL
Black male	1272 ± 532	884	1152	1574
Black female	1252 ± 589	799	1163	1533
Other male	1599 ± 814*	969	1288	2052
Other female	1458 ± 569*	987	1346	1836
Sodium, g
Black male	3.52 ± 1.61	2.28	3.34	4.61
Black female	3.18 ± 1.32	2.35	2.91	3.95
Other male	3.56 ± 1.43	2.66	3.20	4.09
Other female	3.01 ± 1.21†	2.12	2.87	3.74
Potassium, g
Black male	1.89 ± 0.77	1.34	1.79	2.21
Black female	1.70 ± 0.61	1.3	1.66	2.04
Other male	2.35 ± 1.05*	1.72	2.04	2.79
Other female	1.99 ± 0.68*,†	1.52	1.88	2.43
Chloride, g
Black male	5.07 ± 2.27	3.39	4.89	6.42
Black female	4.65 ± 2.02	3.35	4.25	5.43
Other male	5.25 ± 2.18	3.88	5.02	5.99
Other female	4.42 ± 1.76†	3.17	4.32	5.32
Creatinine, g
Black male	2.04 ± 0.62	1.66	2.07	2.42
Black female	1.47 ± 0.36†	1.23	1.47	1.67
Other male	1.82 ± 0.47*	1.49	1.80	2.05
Other female	1.23 ± 0.32*†	0.99	1.24	1.37
Iodine, μg
Black male	252 ± 226	109	171	293
Black female	223 ± 245	103	140	237
Other male	308 ± 292	139	225	374
Other female	259 ± 265	133	185	310

¹The number of observations for total volume and sodium, potassium, chloride, and creatinine excretion are: black male (n = 89), black female (n = 107), male of other races (n = 97), and female of other races (n = 114). *Within an analyte, different from blacks within the same gender, P < 0.05. ^†Within an analyte, different from males within the same race category, P < 0.05.

²The number of observations for iodine excretion were: black male (n = 89), black female (n = 106), male of other races (n = 96), and female of other races (n = 109).