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Table 3 Univariate and multivariate analysis by Cox Regression Model of ICU mortality risk factors

From: Impact of delayed admission to intensive care units on mortality of critically ill patients: a cohort study

  Univariate Multivariate
Variables HR (95% CI) P-value HR- (95% CI) P-value
     adjusted a   
Waiting time 1.013 1.005 to 1.022 0.003 1.015 1.006 to 1.023 0.001
Male sex 1.068 0.796 to 1.433 0.663    
Age (years) 1.006 0.998 to 1.014 0.133    
Comorbidities 1.585 1.128 to 2.229 0.008    
APS score 1.043 1.026 to 1.060 <0.001    
SOFA score 1.103 1.064 to 1.143 <0.001 1.103 1.065 to 1.143 <0.001
TISS 28 score 1.051 1.030 to 1.073 <0.001    
General hospital wardb 1.311 0.979 to 1.756 0.071    
Length of hospital stay before ICU (days) 1.005 0.989 to 1.021 0.524    
Sepsis diagnosis 1.493 1.073 to 2.077 0.018    
  1. χ2 = 38.7512, 2 g. l., P-value < 0.001.
  2. aadjusted to waiting time (hours), age (years), co-morbidities, severity of illness, organ dysfunction, therapeutic interventions, hospital ward origin, hospital length of stay before ICU, and sepsis diagnosis.
  3. b Hospital ward origin, outside emergency department.
  4. ICU, Intensive Care Unit; HR, hazard ratio; APS, Acute Physiology Score; SOFA, Sequential Organ Failure Assessment; TISS 28, Therapeutic Intervention Scoring System.