Table 3.

Urinary biochemical, acid-base and physicochemical profiles. Data are presented as mean ± standard deviation. Statistical significance for Postprandial vs. Fasting is indicated by *p < 0.05, **p < 0.01 and ^†p < 0.001.

	Fasting (N = 8)	1st Postprandial (N = 8)	2nd Postprandial (N = 8)
Urinary Biochemical Profiles
Total Volume, L/2hr	0.211 ± 0.136	0.311 ± 0.193	0.379 ± 0.227**
Na, meq/2hr	15 ± 11	24 ± 33	28 ± 48
K, meq/2hr	16 ± 8	19 ± 11	24 ± 13**
Ca, mg/2hr	8 ± 12	16 ± 28	9 ± 17
Mg, mg/2hr	22 ± 23	33 ± 32	19 ± 23
P, mg/2hr	139 ± 94	155 ± 104	169 ± 131
Uric Acid, mg/2hr	33 ± 12	85 ± 48†	164 ± 94†
Oxalate, mg/2hr	9 ± 7	10 ± 8	9 ± 6
Cl, meq/2hr	28 ± 18	47 ± 37*	49 ± 56
Creatinine, mg/2hr	341 ± 116	429 ± 120**	403 ± 138*
FE Uric Acid	0.63 ± 0.36		0.89 ± 0.53
FE HCO3 × 103	0.36 ± 0.14		1.53 ± 1.71*
Urinary Acid Base Profiles
pH	5.94 ± 0.15	6.16 ± 0.29*	6.15 ± 0.31*
NH4+, meq/2hr	13 ± 6	21 ± 13*	24 ± 14**
Titratable Acidity, meq/2hr	3.3 ± 2.3	3.2 ± 2.3	3.2 ± 2.1
HCO3, meq/2hr	0.2 ± 0.1	0.6 ± 0.6	1.1 ± 1.7
Citrate, meq/2hr	0.050 ± 0.031	0.063 ± 0.047	0.061 ± 0.053
Net Acid Excretion, meq/2hr	15.9 ± 8.4	23.1 ± 13.7*	26.7 ± 13.8**
SO4, mmol/2hr	9 ± 4	10 ± 5	14 ± 9**
NH4+/Total Cations, %	27.9 ± 9.4	35.7 ± 17.1*	37.0 ± 12.6*
Urinary Physicochemical Profiles
SI CaOx	1.43 ± 1.13	1.81 ± 2.49	0.56 ± 0.60*
SI Brushite	0.49 ± 0.58	0.50 ± 0.63	0.24 ± 0.33*
SI Uric Acid	0.58 ± 0.18	0.69 ± 0.39	1.11 ± 0.52
SI NH4 Urate	6.04 ± 2.85	10.13 ± 3.37†	15.17 ± 4.831†