Table 2. The relative abundance (mean±s.e.m.) of the bacterial phylum among the normal, moderate and severe groups.
| Groups | Intergroup | ||||
|---|---|---|---|---|---|
| Phyla | Normal (n=28) | Moderate (n=36) | Severe (n=36) | P value | P<0.05 |
| Firmicutes | 44.69±3.21 | 49.52±2.64 | 45.88±2.93 | 0.478 | — |
| Proteobacteria | 27.66±3.71 | 25.66±3.13 | 27.63±3.57 | 0.893 | — |
| Bacteroidetes | 14.01±1.75 | 12.31±1.67 | 13.30±1.72 | 0.790 | — |
| Actinobacteria | 7.80±1.28 | 7.25±0.74 | 7.02±0.98 | 0.861 | — |
| Fusobacteria | 4.20±0.63 | 2.85±0.39 | 3.29±0.59 | 0.225 | — |
| Spirochaetae | 0.29±0.07 | 0.69±0.12 | 0.82±0.32 | 0.046 | M vs N |
| Synergistetes | 0.25±0.08 | 0.60±0.16 | 0.81±0.12 | 0.035 | S vs N |
| TM7 | 0.43±0.15 | 0.54±0.15 | 0.60±0.28 | 0.864 | — |
| The others | 0.67±0.18 | 0.60±0.12 | 0.66±0.12 | 0.739 | — |
M, moderate group; N, normal group; S, severe group; s.e.m., standard error of the mean.
ANOVA (one-way) and post hoc least significant difference (LSD) were performed for multiple comparisons between the three different niches. The significance threshold was set at 0.05.