Proportion of Prevotellaceae presence
| Group | Proportion containing any Prevotellaceae | Proportion containing Prevotellaceae strains of interest | χ2 test |
| Progressor | 0.38 | 0.87 | 2.32e-15 |
| Non-progressor | 0.75 | 0.67 | 0.0935 |
| NORA | 0.22 | 0.25 | 0.423 |
| Healthy | 0.09 | 0.35 | 0.03 |
NORA, new-onset rheumatoid arthritis.