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Table 2 Patient demographic data and fracture characteristics

From: Incidence and predictors of surgical site infection after distal femur fractures treated by open reduction and internal fixation: a prospective single‐center study

Variables

All patients

(n = 364)

Patients without SSI (n = 342)

Patients with SSI(n = 22)

p value

Gender (males),n(%)

193(53.0)

177(51.8)

16(72.7)

0.056c

Age (years), median

54

55

48

0.186b

Age (years)

   

0.192c

18–45, n(%)

111(30.5)

103(30.1)

8(36.4)

 

46–59, n(%)

105(28.8)

96(28.1)

9(40.9)

 

≥ 60, n(%)

148(40.7)

143(41.8

5(22.7)

 

Location (rural), n(%)

262(72.0)

242(70.8)

20(90.9)

0.041c*

BMI (kg/m2), mean ± SD

25.6 ± 4.1

25.6 ± 4.2

26.1 ± 4.0

0.454a

Obesity (BMI ≥ 28), n(%)

70(19.2)

61(17.8)

9(40.9)

0.084c

Diabetes mellitus, n(%)

86(23.6)

81(23.7)

5(22.7)

0.918c

Hypertension, n(%)

95(26.1)

89(26.0)

6(27.3)

0.897c

Cardiovascular diseases, n(%)

54(14.8)

52(15.2)

2(10.5)

0.578c

History of previous operation, n(%)

115(31.6)

110(32.2)

5(22.7)

0.356c

Smoking, n(%)

50(13.7)

42(12.3)

8(36.4)

0.004c*

Alcohol consumption, n(%)

58(15.9)

49(14.3)

9(15.5)

0.003c*

Open fracture, n(%)

86(23.6)

69(20.2)

17(77.3)

< 0.001c*

Mechanism (high energy), n(%)

232(63.7)

212(62.0)

20(90.9)

0.006c*

Side (left), n(%)

215(59.1)

201(58.8)

14(63.6)

0.653c

Concurrent fractures (≥ 2 sites), n(%)

176(48.4)

158(44.2)

18(81.8)

0.001c*

  1. Abbreviation: SSI surgical site infection, BMI body mass index.
  2. a Student t test.
  3. b Mann-Whitney U test.
  4. c Pearson Chi-Square test.
  5. * indicates significant variable at p < 0.05.