Table 2. Correlation between alteration in microbiota structure (ΔPC1) and change in MGI (ΔMGI) for the 50-host cohort at NG-baseline, baseline-EG and NG-EG.
| Spearman correlation (rho) |
NG to baseline |
Baseline to EG |
NG to EG |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NG.PC1 | ΔPC1 | NG.MGI | ΔMGI | B.PC1 | ΔPC1 | B.MGI | ΔMGI | EG.PC1 | ΔPC1 | EG.MGI | ΔMGI | |
| NG to baseline | ||||||||||||
| NG.PC1 | NA | — | — | — | — | — | — | — | — | — | — | — |
| ΔPC1 | −0.86 | NA | — | — | — | — | — | — | — | — | — | — |
| NG.MGI | 0.37 | −0.42 | NA | — | — | — | — | — | — | — | — | — |
| ΔMGI | −0.36 | 0.4 | −0.98 | NA | — | — | — | — | — | — | — | — |
| Baseline to EG | ||||||||||||
| B.PC1 | NA | — | — | — | — | — | — | — | ||||
| ΔPC1 | 0.28 | −0.51 | NA | — | — | — | — | — | — | |||
| B.MGI | NA | — | — | — | — | — | ||||||
| ΔMGI | 0.39 | −0.38 | 0.53 | NA | — | — | — | — | ||||
| NG to EG | ||||||||||||
| EG.PC1 | 0.4 | −0.44 | 0.89 | 0.48 | NA | — | — | — | ||||
| ΔPC1 | −0.56 | 0.43 | 0.49 | 0.43 | 0.43 | NA | — | — | ||||
| EG.MGI | 0.39 | −0.37 | 0.53 | 1 | 0.48 | 0.43 | NA | — | ||||
| ΔMGI | 0.44 | 0.86 | 0.41 | 0.56 | 0.86 | NA | ||||||
Abbreviations: EG, experimental gingivitis; MGI, Mazza Gingival Index; NG, natural gingivitis; PC1, first principal component.
Only the rho values with its corresponding P<0.05 (that is, significant correlation) were shown. Significant within-phase ΔPC1-ΔMGI correlations were labeled in italic. Significant inter-phase ΔPC1-ΔPC1 or ΔMGI-ΔMGI correlations were labeled in bold.