Table 2.
Factors affecting ED LOS for Invasively Ventilated Non-Trauma Patients
| 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] |
ED = emergency department, HR = hazard ratio, CI = confidence interval, CTAS = Canadian triage and acuity scale, EMS = emergency medical services
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.
A hazard ratio of >1 reflects a greater likelihood of discharge and hence a shorter length of stay.