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Table 1 The table shows numbers of infected nonunion differentiated in type of infection (monomicrobial vs. polymicrobial) and cases in which germ-change occurred in course of surgical treatment. Those data are compared for different demographic data as well as fracture type (closed to open fractures). No significant difference was evidenced comparing infection types and germ change for demographic data and fracture type except previous revision surgery at a referral hospital

From: Polymicrobial infections and microbial patterns in infected nonunions – a descriptive analysis of 42 cases

  infected nonunion Infection Type
[n / %] Mono [n / %] Poly [n / %] Germ Change [n / %] Pearson χ2 Test [p-value]
patients total number 42 / 100 21 / 50.0 6 / 14.3 15 / 35.7
gender female 17 / 40.5 10 / 47.6 4 / 66.7 3 / 20.0 0.13
male 25 / 59.5 11 / 52.4 2 /33.3 12 / 80.0
fracture localization humerus 2 / 4.8 1 / 4.8 0 / 0 1 /6.7  
radius/ulna 3 / 7.1 0 / 0 0 / 0 3 / 20.0  
femur 12 / 28.6 5 / 23.8 3 / 50.0 4 / 26.7 0.24
tibia/fibula 25 / 59.5 15 / 71.4 3 / 50.0 7 / 46.7  
ASA score 1 2 / 4.8 0 / 0 1/ 20.0 1 / 7.1  
2 26 / 61.9 12 / 57.1 2 / 40.0 12 / 85.7 0.05
3 12 / 28.6 9 / 42.9 2 / 40.0 1 / 7.1  
BMI [kg/m2] < 18.5     0.51
18.5–25.0 16 / 39.0 8 / 38.1 3 / 60.0 5 / 33.3
25.0–30.0 7 / 17.1 2 / 9.5 1 /20.0 4 / 26.7
> 30.0 18 / 43.9 11 / 52.4 1 / 20.0 6 / 43.9
fracture closed 24 / 57.1 11 / 52.4 3 / 50.0 10 /66.7 0.69
open 18 / 42.9 10 / 47.6 3 / 50.0 5 / 33.3
revision surgery at referral hospital yes 26 / 61.9 16 / 76.2 5 / 83.3 5 / 33.3% 0.01
no 16 / 38.1 5 / 23.8 1 / 16.7 10 / 66.7%