Table 2. Discriminative species between functional constipation and controls.

Bacteroidetes	FAFV	Proteobacteria
Bacteroides fragilis (528) ↑	Bifidobacterium longum (480) ↑	Proteus mirabilis (898) ↑
Bacteroides ovatus (600) ↑	Ruminococcus spp. (826) ↓	Unknown species (649) ↑
Parabacteroides spp. (507) ↑
Alistipes finegoldii (401) ↓

Discriminative species (nt) of the major phyla of the gut (Firmicutes, Actinobacteria, Fusobacteria, Verrucomicrobia (FAFV), Bacteriodetes and proteobacteria) between children with functional constipation and matched controls, as detected by ridge regression

↑ = increased abundance in functional constipation

↓ = decreased abundance in functional constipation; spp. = species