TABLE 4.

Summary of nitrogen balances for 7 study subjects, after exclusion of the outlier

	Low-normal pH	High-normal pH	P value1
Final arterial pH	7.37 ± 0.012	7.44 ± 0.01	<0.001
Intake (g N/d)
Diet	12.62 ± 2.03	12.58 ± 1.93	0.74
Medications3	2.34 ± 0.43	2.35 ± 0.44	0.30
Total	14.96 ± 2.03	14.93 ± 1.93	0.83
Output (g N/d)
Dialysate	9.67 ± 3.27	8.17 ± 2.89	0.02
Urinary4	0.03 (0.24)5	0.03 (0.52)	0.03
Fecal	3.13 ± 0.64	2.80 ± 0.83	0.37
Total	13.26 ± 2.81	11.61 ± 1.70	0.02
Adjustment in nitrogen retention for changes in serum urea nitrogen and body weight (g N/d)	0.12 (0.55)	0.18 (0.67)	0.40
Net nitrogen balance (g/d)	1.69 ± 1.48	2.97 ± 1.25	0.004

¹Significance of difference between means tested by paired t test and between 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).