Table 4.

Differences in the relative abundance of bacteria at genus level.

Studies	Main alternations of CP
Wu et al., 2021	Veillonella↑, Campylobacter↑, Granulicatella↑, Kingella↑, Filifactor↑,Neisseria↓, Corynebacterium↓, Actinobacillus↓, Moryella↓, Aggregatibacter↓.
Soffritti et al., 2021	Enterococcus↑, Enterobacter↑,Streptococcus↑, Veillonella↑, Prevotella↑, Lactobacillus↑,Capnocytophaga↑, Porphyromonas↑, Abiotrophia↑, Aggregatibacter↑, Atopobium↑,Rothia↓, Haemophilus↓, Parvimonas↓, Fusobacterium↓, Gemella↓.
Shi et al., 2022	Campylobacter↑,Streptococcus↑, Haemophilus↑, Gemella↑, Aggregatibacter↑, Prevotella↓, Veillonella↓, Actinobacillus↓.
Schult et al., 2022	Parabacteroides↑, Lachnoclostridium↑, Blautia↓, Faecalibacterium↓, Ruminococcus↓.
Ren et al., 2021	Leptotrichia↑, Selenomonas↑, Granulicatella↑, megasphaera↑, Haemophilus↓, Porphyromonas↓, Fusobacterium↓.
Miller et al., 2021	Streptococcus↑, Actinomyces↑,Treponema↑, Prevotella↓.
Rafiqul Islam et al., 2022	Streptococcus↑, Rothia↑, Klebsiella↑,Veillonella↑, Enterococcus↑, Neisseria↓, Prevotella↓,Haemophilus↓, Porphyromonas↓.
Iebba et al., 2021	Neisseria↓.
Gupta et al., 2022	Streptococcus↑, Veillonella↑, Prevotella↑, Bacillus↑, Klebsiella↑, Idiomarina↑, Acinetobacter↑, Arenibacter↑, Gemella↑, Chryseobacterium↑, Capnocytophaga↑,Neisseria↓,Haemophilus↓, Pseudomonas↓, Lautropia↓, Rothia↓, Leptotrichia↓, Porphyromonas↓, Actinobacillus↓, Granulicatella↓, Fusobacterium↓, Aggregatibacter↓, Alloprevotella↓, Selenomonas↓.
Cui et al., 2022	Prevotella↑, Streptococcus↑, Veillonella↑, Neisseria↓, Porphyromonas↓, Fusobacterium↓, Haemophilus↓, Rothia↓.
Callahan et al., 2022	Prevotella↑, Bergeyell↑, Schaalia↑, Bacteroidete↑, Neisseria↓.

The symbols "↑" and "↓" respectively represent the increase and decrease in the relative abundance of bacteria at the genus level.