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Table 4 Univariate analysis of laboratory-related variables

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

WBC (109/L)

   

0.420c

 References (4–10), n(%)

208(57.1)

198(57.9)

10(45.5)

 

 > 10, n(%)

152(41.8)

140(40.9)

12(54.5)

 

NEUT (109/L)

   

0.476c

 References (1.8–6.3), n(%)

142(39.0)

135(39.5)

7(31.8)

 

 > 6.3, n(%)

222(61.0)

207(60.5)

15(68.2)

 

LYM (109/L)

   

0.812c

 References (1.1–3.2), n(%)

209(57.4)

195(57.0)

14(63.6)

 

 < 1.1, n(%)

154(42.3)

146(42.7)

8(36.4)

 

MON (109/L)

   

0.818c

 References (0.1–0.6), n(%)

124(34.1)

117(39.5)

7(31.8)

 

 > 0.6, n(%)

240(65.9)

225(65.8)

15(68.2)

 

EOS (109/L)

   

0.829c

 References (0.02–0.52), n(%)

265(72.8)

248(72.5)

17(77.3)

 

 < 0.02, n(%)

96(26.4)

91(26.6)

5(22.7)

 

BAS (109/L)

   

0.408c

 References (0–0.06), n(%)

332(91.2)

313(91.5)

19(86.4)

 

 > 0.06, n(%)

 

29(8.5)

3(14.0)

 

RBC (1012/L)

   

0.076c

 References, n(%)

110(30.2)

107(31.3)

3(13.6)

 

 <Lower limit, n(%)

263(72.3)

244(68.7)

19(86.4)

 

PLT (109/L)

   

0.209c

 References (125–300), n(%)

215(59.1)

206(60.2)

9(40.9)

 

 < 125, n(%)

22(6.0)

20(5.8)

2(9.1)

 

 > 300, n(%)

127(34.9)

116(33.9)

11(50.0)

 

 TP (< 65 g/L)

280(76.9)

264(77.2)

16(72.7)

0.630c

 ALB(g/L), mean ± SD

33.8 ± 5.7

34.0 ± 5.6

30.5 ± 6.3

0.017a*

 ALB (< 30 g/L), n(%)

103(28.3)

91(26.6)

12(11.7)

0.005c*

 GLOB (< 20 g/L), n(%)

73(20.1)

71(20.8)

2(9.1)

0.294c

 A/G, mean ± SD

1.5 ± 0.4

1.5 ± 0.4

1.2 ± 0.3

< 0.001a*

A/G

   

0.001c*

 < 1.35, n(%)

168(46.2)

150(44.0)

18(81.8)

 

 ≥ 1.35, n(%)

196(53.8)

192(56.0)

4(18.2)

 

GLU (mmol/L)

   

0.766c

 References (3.9–6.1), n(%)

160(44.0)

151(44.2)

9(40.9)

 

 > 6.1, n(%)

204(56.0)

191(55.8)

13(51.9)

 
  1. Abbreviation: SSI surgical site infection, WBC white blood cell, NEUT neutrophile, LYM lymphocyte, MON monocyte, EOS eosinophils, BAS basophilic, PLT platelet, TP total protein, ALB albumin, GLOB globulin, A/G albumin/globulin, RBC red blood cell, reference range(1012/L): females 3.5-5.0; males 4.0-5.5.
  2. a Student t test.
  3. c Pearson Chi-Square test.
  4. * indicates significant variable at p < 0.05.