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Table 3 Univariate and Multivariate analyses of factors associated with postoperative pneumonia

From: Effects of sevoflurane and propofol on the development of pneumonia after esophagectomy: a retrospective cohort study

Characteristics Univariate Multivariate
  OR 95% CI P-value OR 95% CI P-value
BMI 0.933 0.886–0.983 0.010 0.935 0.887–0.985 0.012
Alcohol use 1.592 1.122–2.261 0.009 1.513 1.062–2.156 0.022
Total fluids 1.000 1.000–1.000 0.071    
Total crystalloid 1.000 1.000–1.000 0.096    
Blood transfusion 1.570 1.026–2.401 0.038    
Operation time 1.003 1.001–1.004 0.001    
Anesthetic    0.607    
 Sevoflurane 1 Referent     
 Propofol 0.813 0.369–1.791     
Tumor location    0.080    
 Gastroesophageal junction 1 Referent     
 Upper third 2.128 1.109–4.081     
 Middle third 1.797 1.079–2.993     
 Lower third 1.467 0.840–2.561     
Tumor histology    0.090    
 Adenocarcinoma 1 Referent     
 Squamous 1.594 1.027–2.475     
Other 1.128 0.495–2.572     
Minimally invasive approach 1.417 0.965–2.080 0.076    
Surgical procedure    <0.001    0.001
 Sweet 1 Referent   1 Referent  
 Ivor-Lewis 2.019 1.211–3.367   1.993 1.190–3.337  
 Three-incision 1.922 1.330–2.777   1.878 1.296–2.722  
Surgeon experience    0.010    0.039
 High-volume a 1 Referent   1 Referent  
 Low-volume b 1.550 1.111-2.161   1.525 1.090–2.135  
  1. Abbreviation: BMI body mass index, OR odd ratios, CI confidence intervals
  2. aHigh-volume: ≥100 esophagectomy in three years
  3. bLow-volume: <100 esophagectomy in three years