Secondary Analyses
In secondary analysis examining respiratory cultures by specimen source,
ARI diagnosis remained associated with overall organism isolation among
both TA cultures and BAL cultures (Table 5(a) ). ARI remained
not associated with P. aeruginosa or S. aureus isolation
within both specimen source types. In subgroup analysis examining
children with chronic P. aeruginosa isolation (115 cultures among
20 children), children had similar distribution of the most common
organism species identified with and without ARI, with the exception ofM. catarrhalis (Appendix Figure 2 ). ARI remained
associated with overall organism isolation in this subgroup of children
with chronic P. aeruginosa (Table 5(b) ). In subgroup
analysis excluding 417 cultures (11.7% of the total cohort) obtained
from same-day bronchoscopy encounters with no diagnosis data (presumed
surveillance cultures), ARI diagnosis remained associated with organism
isolation (Table 5(c) ).