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Table 1 General characteristics and univariate analysis of risk factors for revision after in distal femoral fractures treated with lateral locking plate

From: Analysis of risk factors for revision in distal femoral fractures treated with lateral locking plate: a retrospective study in Chinese patients

Variable

Non revision group

Revision group

t/z/χ2

P

Number

136

16

Gender (male/female)

28/108

4/12

0.168

0.682*

Age (years)

61.6 ± 14.7

69.0 ± 10.0

− 2.645

0.014¥

DM (yes/no)

36/100

6/10

0.871

0.351£

Tobacco/alcohol (yes/no)

8/128

2/14

0.284*

Steroid usage

6/130

0/16

0.507*

BMI

25.4 ± 3.8

27.3 ± 2.1

− 3.005

0.006¥

Reason of injury (high/low energy)

80/56

10/6

0.080

0.777£

Open/closed

12/124

0/16

0.366*

Fracture type (A2/A3/C1/C2/PF)

24/42/10/42/18

0/10/0/2/4

11.223

0.024£

Supracondylar involved (no/yes)

70/66

4/12

4.015

0.045£

Incision (lateral/lateral + medial)

106/30

8/8

5.961

0.015£

Duration of operation (minutes)

144.2 ± 45.9

163.4 ± 55.0

− 1.550

0.123¥

Quality of reduction (good/bad)

96/40

5/11

9.937

0.002£

R1

3.17 ± 1.43

2.54 ± 0.67

2.997

0.005¥

R2

3.31 ± 1.32

2.45 ± 0.72

3.970

0.000¥

R3

0.35 ± 0.29

0.19 ± 0.18

2.094

0.038¥

Density of supracondylar screws

0.59 ± 0.15

0.65 ± 0.18

− 1.590

0.114#

  1. DM diabetes mellitus, BMI body mass index, PF periprosthetic fracture after total knee arthroplasty, R1 ratio of length of plate/fracture area, R2 the ratio of the length of the plate/fracture area above the condylar, R3 ratio of distance between proximal part of fracture and screw/working length of proximal plate
  2. *Fisher’s exact test
  3. ¥Two-sample Student t test
  4. £Chi-square test
  5. #Mann Whitney U test
  6. The values are given as the mean and the standard deviation for continuous variables and as the number of patients for categorical variables