TABLE 2.

Time-dependency of the bacterial marker cell counts in the dried saliva stains exposed to indoor conditions up to 1 month for sample duplicate sets 1 and 2.

		Sample duplicate 1		Sample duplicate 2
Linear regression analysis		R2	p value	R2	p value
lm(C ∼ T*S)	Individual 1	0.922	<2.2E–16***	0.865	<2.2E–16***
	Individual 2	0.952		0.948
	Individual 3	0.940		0.907
	Individual 4	0.955		0.966
	Individual 5	0.964		0.979
	Individual 6	0.968		0.962
	Individual 7	0.973		0.966
	Individual 8	0.874		0.908
	Individual 9	0.965		0.946
	Individual 10	0.953		0.950
	Individual 11	0.912		0.927
	Individual 12	0.936		0.946
	Individual 13	0.968		0.937
	Individual 14	0.959		0.905
	Individual 15	0.968		0.902
lm(C ∼ T*I)	F. periodonticum	0.941		0.889
	H. parainfluenzae	0.964		0.920
	V. dispar	0.959		0.906
	V. parvula	0.969		0.948
lm(C ∼ T*I + T*S)	Overall	0.546		0.551

lm(C ∼ T*S): time-dependency of the four selected bacterial species altogether in each individual, lm(C ∼ T*I): time-dependency of each selected bacterial species considering the 15 individuals altogether, and lm(C ∼ T*I + T*S): time-dependency of the four selected bacterial species and 15 individuals altogether. R² values indicate the variation explained by the time since stain deposition in the qPCR-derived bacterial cell counts. Asterisks indicate the significance level of the Benjamini-Hochberg corrected p values as follows: 0.001 “***”, 0.01 “**”, and 0.05 “*”.