Table 2.

Association between bacterial taxa and lung function

Taxonomy (% relative abundance)	FEV1%pred		RV_TLC
	r-value	P-value	r-value	P-value
Phylum
Fusobacteria	−0.267	0.032	0.160	0.212
Class
Bacilli	0.354	0.004	−0.234	0.065
Fusobacteria	−0.267	0.032	0.160	0.212
Negativicutes	−0.284	0.022	0.311	0.013
Order
Lactobacillales	0.352	0.004	−0.235	0.064
Fusobacteriales	−0.267	0.032	0.160	0.212
Selenomonadales	−0.284	0.022	0.311	0.013
Family
Veillonellaceae	−0.282	0.023	0.310	0.013
Streptococcaceae	0.352	0.004	−0.234	0.065
Porphyromonadaceae	0.268	0.031	−0.268	0.034
Clostridiales_Incertae_Sedis_XI	0.313	0.011	−0.297	0.018
Genus
Veillonella	−0.294	0.018	0.321	0.010
Streptococcus	0.352	0.004	−0.234	0.065
Streptobacillus	0.391	0.001	−0.491	<0.001
Porphyromonas	0.281	0.024	−0.272	0.031
Parvimonas	0.303	0.014	−0.298	0.018
Filifactor	0.328	0.008	−0.356	0.004
OTU (species level)
otu3 (Veillonella_dispar)	−0.300	0.015	0.322	0.010
otu4 (Streptococcus_unclassified)	0.391	0.001	−0.263	0.037
otu7 (Porphyromonas_catoniae)	0.245	0.049	−0.236	0.063
otu10 (Prevotella_nanceiensis	0.337	0.006	−0.218	0.086
otu22 (Pasteurellaceae_unclassified)	0.318	0.010	−0.240	0.058
otu28 (Porphyromonas_endodontalis)	0.399	0.001	−0.385	0.002

Note: Correlation of bacterial taxa with FEV₁%pred and RV/TLC was evaluated by Spearman coefficient.

Abbreviations: OTU, operational taxonomic unit; FEV₁%pred, predicted percent of forced expiratory volume in 1 s; RV, residual capacity; TLC, total lung capacity.