TABLE 2.

Significant bacterial OTUs in first trimester in PTB vs. term samples.

OTU	Genera	Log fold change	Adj. P-value	DiGiulio	Romero	Hyman	Callahan	Stout
Otu18735	Atopobium	0.143	7.99E-26				Significant	Reported
Otu4548	Lactobacillus	0.295	2.84E-23	Reported	Reported	Reported
Otu7770	Prevotella	0.14	4.11E-17	Reported	Reported	Reported	Reported	Reported
Otu4172	Lactobacillus	−8.00E-09	9.06E-16	Reported	Reported	Reported
Otu875	Olsenella	0.38	4.39E-09
Otu5055	Prevotella	0.155	1.00E-06	Reported	Reported		Reported	Reported
Otu10435	Prevotella	0.11	1.90E-05	Reported	Reported		Reported	Reported
Otu6000	Prevotella	0.135	1.45E-04	Reported	Reported	Reported	Reported	Reported
Otu507	Megasphaera	0.75	1.92E-02	Reported	Reported	Reported	Reported
Otu630	Dialister	0.46	1.92E-02				Significant

For each OTU we show the internal OTU label, the genera label, log fold change between preterm and term models (where positive values show a higher change in preterm), the adjusted p-value by FDR (see section “Materials and Methods”) for the model and whether the taxa were “Significant” or “Reported” in the original cohorts. “Significant” represents a reported significant difference between term and PTB abundance. “Reported” represents abundance measurement reported in the original cohorts in the original papers.