Table 3 No difference regarding infection type (monomicrobial, polymicrobial, germ-change) was evident when compared trauma/accident, antibiotics initially used and duration of initial antibiotic treatment. The same applies for metallic implants which still were in place at time of revision surgery and previous revision surgeries for infected nonunion at referral hospitals prior to definitive surgical treatment
infection type | Pearson χ2 Test | |||||
|---|---|---|---|---|---|---|
mono [n / %] | poly [n / %] | germ-change [n / %] | [value / df] | p-value | ||
trauma / accident | pathological | 0 / 0 | 0 / 0 | 1 / 7.1 | 13.486 / 16 | 0.701 |
motorcycle | 1 / 4.5 | 0 / 0 | 1 /7.1 | |||
car accident | 5 / 22.7 | 1 / 16.7 | 1 / 7.1 | |||
fall > 3 m | 2 / 9.1 | 0 / 0 | 1 / 7.1 | |||
fall < 3 m | 7 / 31.8 | 3 / 50.0 | 5 / 35.7 | |||
pedestrian | 2 / 9.1 | 2 / 33.3 | 2 / 14.3 | |||
shot | 2 / 9.1 | 0 / 0 | 0 / 0 | |||
unknown | 1 / 4.5 | 0 / 0 | 3 / 21.4 | |||
bicycle | 2 / 9.1 | 0 / 0 | 0 / 0 | |||
antibiotics | unknown | 9 / 40.9 | 0 / 0 | 4 / 26.7 | 11.459 / 10 | 0.307 |
cefazolin | 8 / 36.4 | 5 / 83.3 | 7 / 46.7 | |||
ciprofloxacin | 1 / 4.5 | 0 / 0 | 1 / 6.7 | |||
cefazolin / gentamicin | 2 / 9.1 | 1 / 16.7 | 1 / 6.7 | |||
clindamycin | 0 / 0 | 0 / 0 | 2 / 13.3 | |||
ampicillin / sulbactam | 2 / 9.1 | 0 / 0 | 0 / 0 | |||
duration of initial antibiotic therapy | < 24 h | 2 / 14.3 | 0 / 0 | 1 / 10.0 | 2.857 / 4 | 0.643 |
24–72 h | 4 / 28.6 | 4 / 66.7 | 4 / 40.0 | |||
> 72 h | 8 / 57.1 | 2 / 33.3 | 5 / 50.0 | |||
metal in situ | no | 1 / 4.5 | 0 / 0 | 0 / 0 | 0.977 / 2 | 0.613 |
yes | 21 / 95.5 | 6 / 100 | 14 / 100 | |||