Increase in Bifidobacterium is a characteristic of the difference in the salivary microbiota of pregnant and non-pregnant women

Table 7 Multiple regression analysis of the association between salivary B. dentium and other parameters

Model	Unstandardized coefficient		Standardized coefficient	t	p	95% Cl		Adjusted R²
Model	(β)	Standard error	(β)	t	p	Low	High	Adjusted R²
All subjects
(Constant)	2.178	0.178		12.236	0.000	1.822	2.534	0.198
Progesterone	0.000	0.000	0.445	3.916	0.000	0.000	0.001
Pregnant women
(Constant)	2.243	0.338		6.638	0.000	1.555	2.931	0.159
Progesterone	0.000	0.000	0.429	2.686	0.011	0.000	0.001

The dependent variable was B. dentium abundance. Independent variables were age, height, weight, mean PPD, %PPD ≥ 4 mm, %BOP, mean GI, DMF, smoking, estradiol, progesterone, P. gingivalis abundance, P. intermedia abundance, and A. actinomycetemcomitans abundance. CI confidence interval

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