Differences in infection prevalence between Melbourne and Perth as detected in bronchoalveolar lavage at annual review
| Melbourne | Perth | OR (95% CI) | p-value | |
| Samples | 495 | 537 | ||
| Any infection excluding mixed oral flora | 56.0 (277) | 42.1 (226) | 1.85 (1.33–2.58) | 0.001# |
| Aspergillus fumigatus | 9.5 (47) | 9.1 (49) | 1.05 (0.61–1.82) | 0.85 |
| Aspergillus species | 2.4 (12) | 4.5 (24) | 0.58 (0.28–1.23) | 0.16 |
| Candida albicans | 0.4 (2) | 3.5 (19) | 0.11 (0.03–0.48) | 0.01# |
| Escherichia coli | 4.2 (21) | 0.7 (4) | 5.09 (0.96–26.96) | 0.06 |
| Haemophilus influenzae | 15.6 (77) | 6.3 (34) | 3.00 (1.80–5.01) | 0.001# |
| Moraxella catarrhalis | 3.0 (15) | 0.7 (4) | 4.26 (1.53–11.87) | 0.01# |
| Mixed oral flora | 66.7 (330) | 44.9 (241) | 2.46 (1.86–3.25) | 0.001# |
| Pseudomonas aeruginosa | 8.3 (41) | 10.8 (58) | 0.75 (0.43–1.30) | 0.30 |
| Staphylococcus aureus | 18.4 (91) | 8.0 (43) | 2.93 (1.67–5.15) | 0.001# |
Data are reported as n or % (n), unless otherwise stated. OR: odds ratio. #: p<0.05.