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Table 2 Factors affecting ED LOS for Invasively Ventilated Non-Trauma Patients

From: Emergency department length of stay for patients requiring mechanical ventilation: a prospective observational study

  Discharge ED Alive Univariate Multivariate
  n/N % [95% CI] HR [95% CI] HR [95% CI]
Age 1.0 [1.0–1.0] 1.0 [1.0–1.0]
Male gender 176/192 92 [87–95] 1.0 [0.8–1.2] 1.0 [0.8–1.2]
Triage code    
CTAS 1 158/177 89 [84–93] 1 1
CTAS 2 116/121 96 [91–98] 0.8 [0.6–1.1] 0.8 [0.6–1.3]
CTAS 3 17/19 89 [69–97] 0.4 [0.3–0.6] 0.3 [0.2–0.4]
Location of intubation    
Study ED 215/228 94 [90–97] 1 1
Other ED 25/25 100 [−] 6.1 [3.0–12.3] 8.4 [5.4–12.9]
EMS 43/56 77 [64–86] 1.3 [0.8–2.1] 1.5 [1.0–2.4]
Reason for ventilation     
Respiratory/cardiac 112/117 96 [90–98] 1 1
Neurological 116/120 97 [92–99] 1.2 [0.8–1.7] 0.9 [0.7–1.2]
Cardiac arrest 44/60 73 [61–83] 0.8 [0.4–1.6] 0.9 [0.5–1.8]
Other 19/20 95 [76–99] 1.0 [0.7–1.4] 1.0 [0.8–1.2]
  1. ED = emergency department, HR = hazard ratio, CI = confidence interval, CTAS = Canadian triage and acuity scale, EMS = emergency medical services
  2. n/N refers to the number of patients with the identified characteristic (e.g. male gender) that were discharged alive from the ED out of the total number of patients in the study with the same characteristic.
  3. A hazard ratio of >1 reflects a greater likelihood of discharge and hence a shorter length of stay.