Table 5:

Correlation of richness and diversity of fecal microbiota with relative abundance of dominant phyla, families and genera

Taxon*	Richness†		Diversity†
	Spearman r	p value	Spearman r	p value
Actinobacteria	0.04	> 0.1	−0.56	0.005
Bifidobacteriaceae	0.07	> 0.1	−0.57	0.004
Bifidobacterium	0.07	> 0.1	−0.57	0.004
Coriobacteriaceae	0.32	> 0.1	0.06	> 0.1
Eggerthella	0.44	0.03	0.11	> 0.1
Bacteroidetes	0.98	> 0.1	−0.03	> 0.1
Bacteroidaceae	0.10	> 0.1	−0.03	> 0.1
Bacteroides	0.10	> 0.1	−0.03	> 0.1
Proteobacteria	−0.43	0.03	−0.12	> 0.1
Enterobacteriaceae	−0.43	0.03	−0.12	> 0.1
Escherichia–Shigella	−0.41	0.05	−0.25	> 0.1
Firmicutes	0.19	> 0.1	0.60	0.002
Clostridiaceae	0.14	> 0.1	0.51	0.01
Clostridium	0.14	> 0.1	0.51	0.01
Enterococcaceae	−0.08	> 0.1	0.11	> 0.1
Enterococcus	−0.08	> 0.1	0.11	> 0.1
Erysipelotrichaceae	0.37	0.07	0.39	0.06
Lachnospiraceae	0.41	0.05	0.50	0.01
Blautia	0.44	0.03	0.32	> 0.1
Peptostreptococcaceae	0.52	0.01	0.50	0.01
Ruminococcaceae	0.59	0.002	0.55	0.01
Streptococcaceae	−0.01	> 0.1	0.25	> 0.1
Streptococcus	−0.01	> 0.1	0.25	> 0.1
Veillonellaceae	0.04	> 0.1	0.61	0.002
Veillonella	−0.01	> 0.1	0.55	0.01

^*Taxa present in only 1 infant or that had an interquartile range for relative abundance of 0.0–0.0 are omitted.

^†Richness was measured with the Chao1 score, which estimates the number of different species present. Diversity was measured with the Shannon Diversity Index, which evaluates both the number of species and the evenness of their distribution.