Table II.
Detailed proportion of the top 10 phyla in the 5 groups.
| Taxonomy | CO | SG0 | RYGB0 | SG3 | RYGB3 |
|---|---|---|---|---|---|
| Bacteroidetes | 0.306591 | 0.387295 | 0.372221 | 0.440632 | 0.448629 |
| Firmicutes | 0.512184 | 0.441977 | 0.511654 | 0.444814 | 0.467192 |
| Fusobacteria | 0.035732 | 0.000883 | 0.004699 | 0.001771 | 0.019554 |
| Proteobacteria | 0.058096 | 0.093562 | 0.058359 | 0.058849 | 0.046483 |
| Actinobacteria | 0.082309 | 0.064907 | 0.047962 | 0.039593 | 0.010045 |
| Cyanobacteria | 0.000983 | 0.005560 | 0.000256 | 0.001785 | 0.004170 |
| Verrucomicrobia | 0.000976 | 0.003613 | 0.000915 | 0.002588 | 0.003688 |
| Spirochaetes | 0.000051 | 0.000820 | 0.000107 | 0.005384 | 0.000018 |
| Tenericutes | 0.002878 | 0.000035 | 0.003570 | 0.000318 | 0.000089 |
| Saccharibacteria | 0.000096 | 0.000355 | 0.000084 | 0.002578 | 0.000054 |
| Others | 0.000103 | 0.000992 | 0.000172 | 0.001688 | 0.000080 |
None of the species of phyla exhibited a statistically significant difference in its proportion among the different groups. However, a slightly lower proportion of Bacteroidetes and a slightly higher proportion of Fusobacteria were identified in the CO group compared with those in the SG0 group (P=0.28 for Bacteroidetes and P=0.32 for Fusobacteria) and RYGB0 group (P=0.48 for Bacteroidetes and P=0.37 for Fusobacteria). A slightly higher proportion of Bacteroidetes was identified in the SG3 group (P=0.49) and RYGB3 group (P=0.53) compared with the SG0 group and the RYGB0 group, respectively. CO, control group; SG, sleeve gastrectomy; RYGB, Roux-en-Y gastric bypass; SG0/3, group prior to/3 months after SG.