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Table 3 Comparison of SSI outcomes post emergency laparotomy by case mix

From: Prophylactic PICO dressing shortens wound dressing requirements post emergency laparotomy (EL-PICO trial)

Outcomes

Conventional dressing

N = 49 (%)

PICO dressing

N = 47 (%)

Total

N = 96 (%)

P value

SSI

   

0.090a

Yes

7 (14.3)

2 (4.3)

9 (9.4)

 

No

42 (85.7)

45 (95.7)

87 (90.6)

 

SSI by case mix

    

Colorectal

  

42

0.109b

 Yes

4 (8.2)

0 (0.0)

  

 No

18 (36.7)

20 (42.6)

  

General

  

36

0.100b

 Yes

3 (6.12)

2 (4.3)

  

 No

17 (34.7)

14 (29.8)

  

Trauma

  

4

N/A

 Yes

0 (0.0)

0 (0.0)

  

 No

1 (2.0)

3 (6.4)

  

Upper GI

  

10

N/A

 Yes

0 (0.0)

0 (0.0)

  

 No

4 (8.2)

6 (12.8)

  

HPB

  

3

N/A

 Yes

0 (0.0)

0 (0.0)

  

 No

1 (2.0)

2 (4.3)

  

Seroma

   

0.083a

Yes

20 (40.8)

11 (23.4)

31 (32.3)

 

No

29 (59.2)

36 (76.6)

65 (67.7)

 

Dehiscence

   

0.066a

Yes

13 (26.5)

5 (10.6)

18 (18.8)

 

No

36 (73.5)

42 (89.4)

78 (81.3)

 

Length of stay (days)

    

Median (IQR)

11 (6–22.5)

9 (6–14)

 

0.179b

Duration of dressing (days)

    

Median (IQR)

7 (7–22.5)

7 (7–7)

 

< 0.001b

  1. %, Percentage; IQR, interquartile range; N/A, not applicable as no SSI value; N, number; SD, standard deviation; SSI, surgical site infection
  2. aChi square test; bMann Whitney U test; P < 0.05 denotes statistical significance