Fig. 3From: Analysis of sputum microbial metagenome in COPD based on exacerbation frequency and lung function: a case control studyAbundance difference of top 10 bacterial taxa in stable COPD between groups. Mann–Whitney U test identified that a Veillonella, Fusobacterium had a higher relative abundance in NFE group compared with FE group. b Prevotella jejuni had a higher relative abundance in NFE group compared with FE group. c Rothia had a higher relative abundance in mild group compared with severe group d no significant differences of relative abundance of top 10 bacterial species were detected between mild and severe groupBack to article page