Table 1. Salivary miRNA and microbial RNA model performance for predicting collection time.

	Multiple R	Adjusted R2	P-value	Mean Absolute Error (%)
microRNAs
Sample set 1 (n = 24)	0.956	0.833	9.5E-05	9.2
Sample set 2 (n = 48)	0.805	0.540	1.8E-05	14.6
Sample set 3 (n = 48)	0.918	0.794	2.8E-11	12.7
Sample set 3 (no 4AM, n = 44)	0.954	0.880	1.1E-13	8.1
microbial RNAs
Sample set 1 (n = 24)	0.927	0.732	0.0013	13.1
Sample set 2 (n = 48)	0.784	0.496	7.5E-05	15.0
Sample set 3 (n = 48)	0.770	0.468	1.8E-04	21.4
Sample set 3 (no 4AM, n = 44)	0.849	0.624	3.6E-06	15.1