Table of contingency showing the distribution of patients with cystic fibrosis (n=52) according to their Porphyromonas catoniae colonisation status during the follow-up with respect to Pseudomonas aeruginosa status at the end of the follow-up
| Patient group* | P. catoniae colonisation†| |
| Negative | Positive | |
| Group 1 | 16 (59.3%) | 19 (46%) |
| Group 2 | 11 (40.7%) | 6 (24%) |
| Total | 27 | 25 |
*Group 1, patients who remained P. aeruginosa-negative; group 2, patients who became P. aeruginosa-positive; Hazard Ratio 1.7.
†Detection carried out on the penultimate sputum sample.