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Table 3 Comparison between groups

From: Incidence and risk factors for trocar-site incisional hernia detected by clinical and ultrasound examination: a prospective observational study

Variable TSIHu+ TSIHu− p
Age years (SD) 62.56 (17) 57.21 (16.4)  
 ≤ 70 n (%) 9 (50) 45 (77.5) 0.019
 > 70 9 (50) 13 (22.4) 0.037§
Gender n (%)    0.752§
 Male 7 (39) 25 (43)  
 Female 11 (61) 33 (57)  
Diabetes mellitus n (%)    1ƒ
 Yes 2 (11) 8 (13.8)  
 No 16 (88) 50 (86.2)  
COPD (%)    0.247ƒ
 Yes 2 (11) 2 (3.6)  
 No 16 (88) 54 (96.4)  
Smoker (%)    
 Yes 7 (41.2) 12 (22.6) 0.135§
 No 10 (58.8) 41 (77.4)  
BMI kg/m2 (SD) 29.66 (3.89) 26.89 (4.17)  
 ≥ 30 8 (47) 11 (21.2) 0.019
 < 30 9 (53) 41 (78.8) 0.038§
Weight kg (SD) 77.47 (10.21) 73.53 (12.16) 0.234
Height cms, SD 161.29 (7.49) 164.67 (8.46) 0.149
Previous umbilical hernia n (%)    
 Yes 3 (1,7) 4 (7) 0.34ƒ
 No 15 (83) 53 (93)  
Malignancy n (%) 2 (11.1) 7 (12) 1ƒ
Wound infection classification (%)    0.371§
 Clean 2 (11) 6 (10.3)  
 Clean–contaminated 8 (44) 36 (62.1)  
 Contaminated 8 (44) 16 (27.6)  
Emergency n (%)    0.536§
 Urgent 7 (38.9) 18 (31)  
 Elective 11 (61.1) 40 (69)  
Surgeon’s experience (%)    0.441ƒ
 Junior 3 (17) 6 (10.5)  
 Senior 15 (83) 51 (89.5)  
Operative time (minutes) 94.33 (41.3) 84.6 (45) 0.417
Follow up (months) 33.17 (5.31) 33.825 (4.05) 0.582
  1. §Chi square
  2. ƒf Fisher
  3. t Student
  4. U de Mann–Whitney