Table 3: Comparison of baseline pH with pH at different time intervals within each group

		p-value
Group		Baseline-5 minutes		Baseline-10 minutes		Baseline-15 minutes		Baseline-30 minutes		Baseline-120 minutes
1		–0.15		–0.19		–0.14		–0.02		+0.1
		0.082		0.015*		0.166		0.905		0.398
2		–0.09		+0.07		+0.05		+0.13		+0.19
		0.305		0.368		0.194		0.027*		0.007*
3		–0.42		–0.28		–0.24		–0.24		–0.05
		0.005*		0.013*		0.020*		0.106		0.608
4		–0.55		–0.3		–0.16		–0.2		+0.03
		0.005*		0.041*		0.090		0.034*		0.478

– Decrease in pH; + Increase in pH; *Statistically significant obtained using Wilcoxon signed rank test