Table 2. Relative abundance of bacterial taxa at various taxonomic levels in association with pre-BMI status.

Taxa (phylum)	p value	Normal weight	overweight	obese
Firmicutes	0.028*	8.34	8.73	8.82
Tenericutes	0.045*	0.15	0.06	0.07
Bacteroidetes	0.064	2.49	1.70	1.69
Proteobacteria	0.14	0.71	0.35	0.39
Verrucomicrobia	0.31	1.43	1.86	1.19
Synergistetes	0.34	0.07	0.00	0.00
TM7	0.46	0.09	0.08	0.10
Actinobacteria	0.51	3.99	3.59	3.79
Taxa (family)
Lachnospiraceae	0.0032*	5.66	6.4	6.81
Leuconostocaceae	0.021*	0.056	0.14	0.098
Desulfovibrionaceae	0.022*	0.13	0.038	0.016
Actinomycetaceae	0.029*	0.18	0.19	0.25
Bacteroidaceae	0.034*	2.18	1.38	1.45
Taxa (genus)
Dialister	0.0098*	0.4	0.2	0.64
Faecalibacterium	0.01*	0.96	1.5	0.99
Coprococcus	0.013*	2.61	3.04	3.54
Catenibacterium	0.016*	0.0012	0	0.25
Actinomyces	0.018*	0.17	0.19	0.25
Blautia	0.032*	3.2	3.55	4.04
Bacteroides	0.034*	2.18	1.38	1.45

Data are mean values.

*The significance of difference between the groups was assessed (p<0.05; ANOVA).