Table 3.

Comparisons of saliva flow rate and pH between pregnant and non-pregnant group at first visit and second visit and within groups between the first visit and second visit

	1st visit	2nd visit	p valuesa
Saliva flow rate (ml/min)
Non-pregnant	1.71 ± 0.46	1.78 ± 0.48	0.318
Pregnant	1.86 ± 0.49	1.89 ± 0.40	0.776
p valuesb	0.304	0.457
Saliva pH
Non-pregnant	7.04 ± 0.28	7.03 ± 0.24	0.782
Pregnant	6.69 ± 0.35	6.73 ± 0.28	0.433
p valuesb	< 0.0005	< 0.0005

Results expressed in mean ± SD. ^a Differences between first and second visit, Wilcoxon signed rank test. ^b Differences between non-pregnant and pregnant women, Mann–Whitney U test.