Table 3.

Subgroup and sensitivity analyses: pooled odds ratios for mortality according to delayed intensive care unit admission and 95% confidence intervals.

	Pooled odds ratio	95% confidence interval
Patient population
Patients admitted from the emergency department (n = 15)	1.64	1.38-1.94
Patients admitted from the wards (n = 9)	1.78	1.49-2.13
Postoperative patients (n = 4)	2.44	1.49-4.01
Definition of nondelayed ICU admission group
Patients immediately/directly admitted to the ICU (n = 15)	1.62	1.36-1.93
Patients with shorter ICU admission delay than that of the delayed ICU admission group (n = 19)	1.63	1.39-1.88
Mortality
Unadjusted (n = 16)	1.59	1.42-1.79
Adjusted (n = 18)	1.71	1.38-2.12
Hospital (n = 25)	1.51	1.49-1.58
ICU (n = 11)	1.57	1.27-1.95