| Variables | Postoperative    complications | COR (Crude odds ratio) (95% CI) | AOR(Adjusted odds ratio) (95% CI) | 
      
        | Yes | No | 
      
        | Anesthesia type | 
      
        | GA | 86 (25.3%) | 253 (74.7%) | 10.87 (2.60;45.35)** | 8.72(2.01;37.73)** | 
      
        | SA | 2 (3.1%) | 64 (96.9%) | 1.00 | 1.00 | 
      
        | Intra-operative Blood loss | 
      
        | ≤ 500 ml | 53 (1.13%) | 224 (98.7%) | 1.00 | 1.00 | 
      
        | >500ml | 35 (27.3%) | 93 (73.6%) | 1.59 (0.97;2.59)* | 2.02 (1.18;3.46)* | 
      
        | Postoperative analgesia administered | 
      
        | No | 60 (28.0%) | 155 (72.0%) | 2.24 (1.35;3.69)** | 2.00(1.17;3.43)* | 
      
        | Yes | 28 (14.7%) | 162 (85.3%) | 1.00 | 1.00 | 
      
        | Duration of surgery | 
      
        | ≤ 1hour | 19 (13.7%) | 120 (84.3%) | 1.00 | 1.00 | 
      
        | >1 hour | 69 (26.0%) | 197 (74.0%) | 2.21(1.26;3.85)** | 2.12 (1.18;3.83)* | 
      
        | **Significant at P<0.001; * Significant at P<0.05 |