Table 3.

Percentages of peripheral blood immune cell subsets.

Cell type (%)	PW group (n = 18)			HW group (n = 19)			PW versus HW
	Baseline	Week 4	∆	Baseline	Week 4	∆	P
CD4	40.2 ± 9.0	36.7 ± 10.2	– 3.5 ± 4.8**	38.2 ± 7.3	35.8 ± 8.6	– 2.4 ± 3.6**	0.443
CD8	30.9 ± 6.6	26.1 ± 7.0	– 4.8 ± 2.1***	32.2 ± 7.4	27.8 ± 7.2	– 4.5 ± 2.6***	0.642
CD20	10.0 ± 3.2	11.0 ± 3.2	1.1 ± 3.0	9.0 ± 2.0	10.5 ± 2.9	1.5 ± 2.5*	0.900
CD14	7.2 ± 3.6	10.2 ± 10.7	2.9 ± 11.9	5.6 ± 2.3	5.0 ± 2.9	– 0.6 ± 3.5	0.039
CD11b	34.1 ± 6.5	36.8 ± 12.3	2.7 ± 13.6	31.6 ± 6.1	33.7 ± 10.4	2.1 ± 8.7	0.634

All values are means ± SDs. Percentages indicate the percent of live cells expressing the indicated cell surface markers. There were no significant differences between PW and HW groups for all immune cell frequencies at baseline on the basis of an unpaired t test or a Mann–Whitney U test. ∆ indicates the change from baseline to week 4. Significant differences between baseline and week 4 within each group were determined with a paired t test (*P < 0.05; **P < 0.01; ***P < 0.001). P values were obtained with the use of a general linear model adjusting for the value at baseline as a covariate. PW, plain water; HW, H₂-rich water.