Abbreviations: ARI: acute respiratory illness; RRR: relative risk ratio;
OR: odds ratio; CI: confidence interval.
a Calculated using a multinomial logistic regression
equation to control for patient-level covariates [including: number of
complex chronic conditions, ventilator use, race, ethnicity, insurance
type], culture-level covariates [including: age at culture
acquisition, time with tracheostomy at culture acquisition, culture
source (tracheostomy aspirate or bronchoalveolar lavage), department
obtained], and to account for within-patient clustering and, for
polymicrobial cultures, within-culture clustering.
b Other organism category includesAchromobacter, Chryseobacterium, Citrobacter, Elizabethkingia,
Enterococcus, Delftia, Flavobacterium, Neisseria, Nocardia, Pantoea,
Proteus, and Raoultella species, and Streptococcus dysgalactiae.