Comparison of the sputum and aerosol concentrations between the GNB and S. aureus groups
| Sputum parameter; mean* (95% CI) | Stratified by organism/s identified in sputum | P values | |||
| GNB, n=18† | Staphylococcus aureus, n=16 | ||||
| Sputum bacterial concentration (CFU/mL×106) | 7.0 (1.6 to 31) | 1.3 (0.2 to 7.5) | 0.13 | ||