TABLE 3.

Summary of nitrogen balances for the 8 study subjects

	Low-normal pH	High-normal pH	P value1
Final arterial pH	7.37 ± 0.012	7.44 ± 0.02	<0.001
Intake (g N/d)
Diet	12.57 ± 1.88	12.54 ± 1.79	0.73
Medications3	2.31 ± 0.41	2.32 ± 0.42	0.32
Total	14.88 ± 1.89	14.86 ± 1.80	0.82
Output (g N/d)
Dialysate	9.21 ± 3.30	7.99 ± 2.73	0.04
Urinary4	0.04 (0.21)5	0.12 (1.00)	0.02
Fecal	3.01 ± 0.67	2.66 ± 0.87	0.26
Total	12.64 ± 3.15	11.35 ± 1.75	0.06
Adjustment in nitrogen retention for changes in serum urea nitrogen and body weight (g N/d)	0.07 (0.54)	0.11 (0.63)	0.26
Net nitrogen balance (g/d)	2.29 ± 2.18	3.22 ± 1.37	0.06

¹Significance of difference between means tested by paired t test and of medians by Wilcoxon's signed-rank test.

²Mean ± SD (all such values).

³Includes ammonium chloride and/or ammonium acetate in the 4 patients who received them.

⁴Six of the 8 subjects had measurable urine outputs.

⁵Median; interquartile range in parentheses (all such values).