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Table 3 Details of surgical data

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

Preoperative stay (days), median

6

6

5

0.184b

Preoperative stay (≥ 7 days), n(%)

176(48.4)

165(48.2)

11(50.0)

0.873c

Incision cleanliness

   

< 0.001c*

 I, n(%)

333(91.5)

322(94.2)

11(50.0)

 

 II, n(%)

18(5.0)

14(4.1)

4(18.2)

 

 III, n(%)

13(3.5)

6(1.8)

7(31.8)

 

ASA

   

0.133c

 I-II, n(%)

236(64.8)

225(65.8)

11(50.0)

 

 III-V, n(%)

128(35.2)

117(34.2)

11(50.0)

 

Anesthesia type

   

0.497c

 Local anesthesia, n(%)

16(4.4)

14(4.1)

2(9.1)

 

 Combined spinal-epidural, n(%)

155(42.6)

147(43.0)

8(36.4)

 

 General, n(%)

193(53.0)

181(52.9)

12(54.5)

 

 Drainage use, n(%)

190(52.2)

174(50.9)

16(72.7)

0.047c*

 Plate use(vs. without plate), n(%)

282(77.5)

263(76.9)

19(86.4)

0.303c

 Intraoperative blood loss (ml), median

400

400

550

0.151b

 Intraoperative blood loss

≥ 400 mL, n(%)

174(47.8)

161(47.1)

13(59.1)

0.274c

 Surgical duration (minutes), median

165

163

180

0.136b

Surgical duration

   

0.312c

 < 120 min, n(%)

58(15.9)

56(16.4)

2(9.1)

 

 120–180 min, n(%)

191(52.5)

181(52.9)

10(45.5)

 

 > 180, n(%)

115(31.6)

105(30.7)

10(45.5)

 

 Postoperative stay (days), median

12

11

36

< 0.001b*

  1. Abbreviation: SSI surgical site infection, ASA American Society of Anesthesiologists
  2. b Mann-Whitney U test.
  3. c Pearson Chi-Square test.
  4. * indicates significant variable at p < 0.05.