Table 2.

Antioxidant capacity and oxidative damage markers.

Measure	PW group (n = 17–18)			HW group (n = 16–20)			PW versus HW
	Baseline	Week 4	∆	Baseline	Week 4	∆	P
BAP (µmol/L)	2,080.6 ± 236.6	2,275.0 ± 394.5	194.4 ± 315.4*	2,109.5 ± 234.5	2,407.3 ± 303.6	297.8 ± 274.2***	0.267
d-ROMs (CARR.U)	354.9 ± 70.7	349.0 ± 56.1	– 5.9 ± 28.9	391.5 ± 98.8	384.3 ± 96.4	– 7.3 ± 38.9	0.700
8-OHdG (ng/mL)	1.99 ± 1.27	1.04 ± 0.59	– 0.94 ± 1.44*	2.05 ± 0.95	0.73 ± 0.60	– 1.32 ± 1.05***	0.144

All values are means ± SDs. There were no significant differences between PW and HW groups for all measures 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 the use of 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; BAP, biological antioxidant potential; d-ROMs, derivatives of reactive oxygen metabolites; 8-OHdG, 8-Oxo-2-deoxyguanosine.