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
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% | ||