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Table 5 Univariable and multivariable logistic analysis for risk factors associated with ventilation time>24 h

From: Impact of body mass index on early and mid-term outcomes after surgery for acute Stanford type A aortic dissection

Risk factor

Univariable analysis

Multivariable analysis

OR (95% CI)

P value

OR (95% CI)

P value

Age (years)

1.011 (0.985–1.039)

0.398

  

Male

0.878 (0.479–1.609)

0.673

  

BMI (kg/m2)

 BMI < 25

1.000

 

1.000

 

 BMI ≥ 25

1.589 (0.927–2.724)

0.092

1.565 (0.890–2.751)

0.120

 BMI ≥ 30

2.737 (1.335–5.612)

0.006

2.261 (1.056–4.838)

0.036

Hypertension

1.474 (0.758–2.865)

0.253

  

CAD

2.442 (1.293–4.610)

0.006

1.508 (0.353–6.440)

0.579

Diabetes

0.427 (0.085–2.155)

0.303

  

Cerebrovascular events

1.802 (0.608–5.347)

0.288

  

CKD

0.652 (0.058–7.281)

0.728

  

NYHA≥3

0.869 (0.239–3.154)

0.831

  

Organ malperfusion

 Cardiac

0.867 (0.300–2.508)

0.792

  

 Cerebral

0.422 (0.112–1.595)

0.203

  

 Visceral

0.432 (0.044–4.206)

0.470

  

 Limb

2.709 (0.663–11.070)

0.165

  

LVEF

1.021 (0.959–1.087)

0.510

  

Median or massive AR

0.465 (0.260–0.832)

0.010

0.492 (0.249–0.971)

0.041

Bentall

0.536 (0.303–0.948)

0.032

0.746 (0.383–1.453)

0.389

CABG

2.176 (1.170–4.047)

0.014

1.549 (0.374–6.421)

0.546

CPB time

1.002 (0.999–1.006)

0.249

  

Cross-clamp time

0.999 (0.993–1.005)

0.696

  

Circulatory arrest time

1.051 (0.978–1.129)

0.174

  

Transfusion

 Red blood cells

1.094 (0.979–1.223)

0.113

  

 Fresh frozen plasma

1.001 (1.000–1.001)

0.008

1.001 (1.000–1.001)

0.019

 Platelets

1.305 (0.987–1.726)

0.062

1.313 (0.948–1.818)

0.101

  1. OR odds ratio, CI confidence interval