Table 2.

Baseline and followup values for systolic blood pressure and 8-h urine excretion of Na⁺ and K⁺

	Usual Care Group	NaCl Group	${\text{HCO}}_3^{-}$ Group	P Value
Systolic blood pressure, mmHg
Year 0	153.7 (13.3)	156.1 (15.7)	155.3 (13.7)	0.75*
Year 10	134.1 (8.9)	133.0 (7.6)	135.6 (7.1)	0.25*
P value†	<0.01	<0.01	<0.01
Urine Na+ excretion, mmol/8 h
Year 0	78.4 (5.8)	77.3 (6.0)	75.9 (6.1)	0.82*
Year 10	75.8 (6.0)	87.6 (5.9)	84.3 (6.2)	<0.01*
P value†	0.25	<0.01	<0.01
Urine K+ excretion, mmol/8 h
Year 0	36.8 (5.1)	34.6 (5.3)	35.5 (5.0)	0.85*
Year 10	35.3 (5.2)	36.0 (5.2)	37.8 (5.1)	0.23*
P value†	0.63	0.19	0.039

Values are means (SD); n = 40 participants/group. Patients with chronic kidney disease stage 2 were divided into the following three groups: usual care or treatment with oral NaCl or NaHCO₃ (${\text{HCO}}_3^{-}$). P values at the end of the rows compare values in that row.

^*Kruskal-Wallis test for comparing three groups. All other P values were from one-way ANOVA.

^†P values below year 0 and year 10 values compare values for those years.