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Table 2 Univariate analysis of the risk factors for postoperative wound complication

From: The radiographic soft tissue thickness is associated with wound complications after open reduction and internal fixation of patella fractures

Variable

Wound complication (n = 25)

No wound complication (n = 212)

P value

Male gender (%)

16 (64.0)

101 (47.6)

0.122

Age (mean years ± SD)

50.4 ± 11.2

53.4 ± 13.4

0.275

BMI, kg/m2 (mean ± SD)

24.7 ± 2.0

24.4 ± 3.2

0.676

Hypertension (%)

5 (20.0)

51 (24.1)

0.652

Diabetes (%)

4 (16.0)

30 (14.2)

0.803

Smoking history (%)

3 (12.0)

29 (13.7)

0.816

AO/OTA classification

  

0.177

 34C-1 (%)

16 (64.0)

127 (59.9)

 

 34C-2 (%)

9 (36.0)

60 (28.3)

 

 34C-3 (%)

0 (0)

25 (11.8)

 

Time to X-ray test, days (mean ± SD)

2.2 ± 1.3

1.7 ± 1.6

0.218

Time to operation, days (mean ± SD)

6.9 ± 3.8

5.8 ± 2.7

0.064

Preoperative level of CRP, mg/L (mean ± SD)

17.2 ± 20.3

7.9 ± 11.7

 < 0.001*

Surgeon

  

0.793

 Surgeon 1 (%)

7 (28.0)

63 (29.7)

 

 Surgeon 2 (%)

4 (16.0)

45 (21.2)

 

 Surgeon 3 (%)

9 (36.0)

57 (26.9)

 

 Surgeon 4 (%)

5 (20.0)

47 (22.2)

 

fPSTTR (mean ± SD)

1.02 ± 0.12

0.93 ± 0.17

0.012*

tPSTTR (mean ± SD)

0.68 ± 0.14

0.66 ± 0.16

0.465

  1. *P < 0.05 was considered statistically significant
  2. n Number, SD Standard deviation, BMI Body mass index, CRP C-reactive protein, PSTTR Periarticular soft tissue thickness ratio, fPSTTR Femoral PSTTR, tPSTTR Tibial PSTTR