Skip to main content

Table 3 Cox proportional hazards regression for mortality

From: The association between culture positivity and long-term mortality in critically ill surgical patients

Characteristics Univariable Multivariable
HR (95% CI) p value HR (95% CI) p value
Basic characteristics
 Age, per 1 year increment 1.029 (1.026–1.032)  < 0.001 1.019 (1.016–1.022)  < 0.001
 Male gender 1.296 (1.184–1.419)  < 0.001 1.167 (1.063–1.281) 0.001
 Body mass index, pre 1 increment 0.947 (0.937–0.956)  < 0.001 0.955 (0.946–0.965)  < 0.001
Comorbidities
 Diabetes mellitus 1.292 (1.176–1.419)  < 0.001 1.171 (1.062–1.291) 0.001
 Congestive heart failure 1.272 (1.100–1.470) 0.001 1.370 (1.172–1.601)  < 0.001
 Chronic pulmonary disease 1.819 (1.482–2.232)  < 0.001 1.166 (0.942–1.442) 0.158
 Moderate or severe liver disease 2.002 (1.635–2.452)  < 0.001 1.326 (1.077–1.633) 0.008
 End-stage renal disease 1.841 (1.299–2.610)  < 0.001 1.434 (1.007–2.042) 0.046
 Malignancy 2.435 (2.227–2.663)  < 0.001 2.155 (1.929–2.408)  < 0.001
 Presence of metastatic tumour 3.728 (3.198–4.344)  < 0.001 4.553 (3.867–5.360)  < 0.001
Types of surgery
 Cardiovascular surgery Reference   Reference  
 Neurosurgery 1.454 (1.266–1.670)  < 0.001 1.410 (1.207–1.647)  < 0.001
 Major abdominal surgery 4.013 (3.448–4.671)  < 0.001 1.527 (1.276–1.828)  < 0.001
Severity and managements
 APACHE II, per 1 increment 1.115 (1.107–1.123)  < 0.001 1.064 (1.056–1.073)  < 0.001
 Presence of shock 1.994 (1.831–2.172)  < 0.001 1.401 (1.273–1.542)  < 0.001
 Receiving mechanical ventilation 2.300 (2.115–2.501)  < 0.001 1.079 (0.969–1.201) 0.166
 Fluid overload, days 1–3, per 1-L increment 1.104 (1.087–1.120)  < 0.001 1.031 (1.016–1.047)  < 0.001
 Receiving renal replacement therapy 4.372 (3.831–4.989)  < 0.001 1.966 (1.693–2.284)  < 0.001
Positive culture during admission 2.842 (2.614–3.091)  < 0.001 1.579 (1.422–1.754)  < 0.001