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. 2013 Jun 4;45(2):271–280. doi: 10.1016/j.jemermed.2012.11.102

Table 3.

Summary of Multiple Linear Regression Model Estimating Log-transformed Waiting Time for Individual Non-emergency (Category III–V) Patients

Explanatory Variable Percent Change in Waiting Time on Non-emergent Patients
Percent Change (95% CI) p-Value
Age, years
 ≤65 Reference
 >65 0.1 (−0.9–1.2) 0.810
Mode of arrival
 Walk-in Reference
 Ambulance −13.2 (−13.9 to −12.2) <0.001
Disposition status
 Discharged Reference
 Admitted −5.3 (−6.4 to −4.2) <0.001
Triage category
 III Ref
 IV 374.5 (369.4–379.7) <0.001
 V 529.5 (518.4–540.8) <0.001
Crowding factor
 Number of all non-emergent patients waiting for triage 4.6 (4.4–4.8) <0.001
 Number of Category III patients waiting for consultation 8.2 (7.9–8.4) <0.001
 Number of Category IV patients waiting for consultation 2.7 (2.6–2.7) <0.001
 Number of Category V patients waiting for consultation 0.9 (0.8–1.1) <0.001
 Number of Category III patients in treatment 1.0 (0.9–1.1) <0.001
 Number of Category IV patients in treatment 0.6 (0.6–0.7) <0.001
 Number of Category V patients in treatment −2.3 (−2.7 to −1.9) <0.001
Number of emergent patients 14.9 (14.2–15.5) <0.001

CI = confidence interval.