Table 4.

Pairwise comparison using Wilcoxon sign-ranked test of the hydrogen water group for anaerobic culture

Time pairs	Z	P
Baseline 0 min-1 min	−3.324	0.001**
Baseline 0 min-2.5 min	−3.025	0.002**
Baseline 0 min-5 min	−2.744	0.006**
1 min-2.5 min	−1.345	0.179#
1 min-5 min	−.980	0.327#
2.5 min-5 min	−1.198	0.231#

**P<0.01 Statistically highly significant difference, ^#P>0.05 nonsignificant difference. P – Level/test of significance; Z – Number of standard deviations from mean