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Table 3 Odds ratio for increased length of hospital stay (≥6 days; 80percentile) associated with clinical variables in patients undergoing cholecystectomy due to cholecystitis

From: The utility of the preoperative neutrophil-to-lymphocyte ratio in predicting severe cholecystitis: a retrospective cohort study

  Univariate analysis Multivariate analysis
  Odds ratio 95% C.I. p-value Odds ratio 95% C.I. p-value
Age    < 0.001    < 0.001
  < 50 years (standard)       
  ≥ 50 years 2.553 1.642 – 3.970   2.312 1.472 – 3.630  
Sex    0.036    
  Woman (standard)       
  Man 1.508 1.036 – 2.195     
Body-mass index    1.000    
  < 25 (standard)       
  ≥ 25 0.988 0.677 – 1.440     
History of prior laparotomy    0.491    
  No (standard)       
  Yes 0.829 0.521 – 1.318     
Preoperative leukocyte count (/mm3)    0.001    
  < 10,000 (standard)       
  ≥ 10,000 1.928 1.307 – 2.844     
Preoperative NLR    < 0.001    0.003
  < 3.0 (standard)       
  ≥ 3.0 2.482 1.696 – 3.633   1.876 1.246 – 2.825  
Admission via ED    < 0.001    0.007
  No (standard)       
  Yes 2.172 1.485 – 3.178   1.764 1.170 – 2.660  
Approach of operative method*    0.613    
  Conventional surgery       
  Reduced port surgery 0.892 0.602 – 1.321     
  1. Abbreviations: ED emergency department, NLR neutrophil-to-lymphocyte ratio.
  2. *Conventional surgery included open surgery, 3-port and 4-port cholecystectomies, and reduced port surgery includes 2-port and single-port laparoscopic cholecystectomies.