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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