Sputum sample bacterial diversity and phyla for ex-smokers and never-smokers
| Ex-smoker | Never-smoker | p-value | |
| Subjects | 16 | 14 | |
| Shannon index | 3.8 (3.5, 4.4) | 2.8 (1.1, 4.1) | 0.010 |
| Simpson index | 0.9 (0.8, 0.9) | 0.7 (0.3, 0.9) | 0.040 |
| Bacteria phyla | |||
| Actinobacteria | 4.0 (2.0, 7.5) | 2.6 (0.3, 4.5) | 0.077 |
| Bacteroidetes | 14.5 (8.4, 23.9) | 9.1 (1.1, 22.9) | 0.299 |
| Firmicutes | 32.4 (26.3, 37.2) | 21.2 (5.4, 40.7) | 0.271 |
| Fusobacteria | 4.0 (3.4, 9.3) | 2.1 (0.4, 5.0) | 0.028 |
| Proteobacteria | 41.5 (22.6, 43.1) | 60.3 (21.3, 91.4) | 0.360 |
Data are presented as n or median (quartile 1, quartile 3), unless otherwise stated.