| Variables | 
        G1 | 
        G2 | 
        P-value | 
      
      
        | Age (years) | 
        52.4 ± 10.8 | 
        54.2 ± 13.4 | 
        NS | 
      
      
        | Weight (kg) | 
        77.4 ± 31.2 | 
        72.5 ± 9.7 | 
        NS | 
      
      
        | Height (cm) | 
        162.5 ± 6.9 | 
        164.07 ± 1.47 | 
        NS | 
      
      
        | Male gender | 
        16 (53%) | 
        17 (57%) | 
        NS | 
      
      
        | Type of surgery | 
        
      
        Open colectomy 
          Open cystectomy 
          Abdominoperineal resection | 
         11 (36.7%) 
          9 (30%) 
          10 (33.3%) | 
         7 (23.3%) 
          12 (40%) 
          11 (36.7%) | 
         NS 
          NS 
          NS | 
      
      
        | Site of ischemia | 
        
      
        Lateral 
          Inferior 
          Anterior 
          Mixed | 
         5 (16.7%) 
          15 (50%) 
          6 (20%) 
          4 (13.3%) | 
         4 (13.3%) 
          16 (53.3%) 
          7 (23.3%) 
          3 (10%) | 
         NS 
          NS 
          NS 
          NS | 
      
      
        | Risk factors | 
        
      
        1-Previous history of MI 
          2-Heavy smoker 
          3-DM 
          4-Hypertension 
          5-Obesity | 
         1 (3.3%) 
          7 (23.3%) 
          9 (30%) 
          12 (40%) 
          5 (16.6%) | 
         2 (6.6%) 
          6 (20%) 
          8 (26.6%) 
          14 (46.6%) 
          4 (13.3%) | 
         NS 
          NS 
          NS 
          NS 
          NS | 
      
      
        | Lee index, Risk of MPCE % (95% CI) | 
        
      
        2, 2.4 (1.3–3.5) 
          ≥3, 5.4 (2.8–7.9) | 
         22 (73%) 
          8 (27%) | 
         21 (70%) 
          9 (30%) | 
         NS 
          NS | 
      
      
        | Duration of surgery (hours)  | 
        3.15 ± 0.87 | 
        3.30 ± 1.04 | 
        NS | 
      
    
    Data are expressed as mean ± SD or number (%). CI, confidence interval; NS, Non significant; MPCE, major perioperative cardiac events