Table 1. OTUs showing a trend towards differential expression between patients with IBS and controls. SEM = standard error of the mean.

		Abundance (%) mean ± SEM
OTU	Taxonomy	Patients	Controls	p (unadjusted)
4391262	Proteobacteria, Escherichia (genus)	2.78 ± 1.73	10.29 ± 2.56	0.080
4465561	Bacteroidetes, Prevotella (genus)	3.16 ± 0.51	1.56 ± 0.76	0.025
4425214	Firmicutes, Streptococcus (genus)	0.94 ± 0.29	2.27 ± 0.42	0.054
271159	Firmicutes, Carnobacteriaceae (family)	1.54 ± 0.41	0.73 ± 0.60	0.081
31235	Fusobacteria, Leptotrichia (genus)	1.14 ± 0.78	0.11 ± 1.15	0.077