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. 2012 Oct 9;7:108. doi: 10.1186/1749-8090-7-108

Table 3.

Risk factors of abdominal complications

  Patients Patients with abdominal complications
Age
  
  
   ≥75
 74
 4
   <75
 2275
 29
Heart function
  
  
   NYHA class IV
 59
 11
   NYHA class ≤ III
 2290
 22
History of peptic ulcer
  
  
   Positive
 9
 4
   Nagetive
 2340
 29
Postoperative cardiac output
  
  
   Low cardiac output
 282
 16
   Normal cardiac output
 2067
 17
Ventilation duration
  
  
   ≥48 h
 458
 21
   <48 h 1891 12