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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.