Table 2 Single factor analysis of recurrent infection after prosthesis removal and antibiotic bone cement spacer implantation
Risk factors | No reinfection group (N = 31) | Reinfection group (N = 9) | χ2 | p value | |
|---|---|---|---|---|---|
Patient characteristics | Age (years) | ||||
≥ 65 | 23 (74%) | 6 (67%) | – | – | |
< 65 | 8 (26%) | 3 (33%) | 0.094 | 0.7587 | |
aCCI score | |||||
< 3 | 19 (61%) | 4 (44%) | – | – | |
≥ 3 | 12 (39%) | 5 (56%) | 0.758 | 0.3839 | |
Medical conditions | Diabetes | 5 (16%) | 2 (22%) | 0.227 | 0.6335 |
Microbiology | Culture negative | 12 (39%) | 4 (44%) | 0.051 | 0.8217 |
Gram-negative bacteria | 4 (13%) | 1 (11%) | 0.001 | 0.9748 | |
Other risk factors | Duration of infection | ||||
< 3 Months | 9 (29%) | 6 (67%) | – | – | |
≥ 3 Months | 22 (71%) | 3 (33%) | 5.299 | 0.0213 | |
History of prior Infection | 2 (6%) | 1 (11%) | 0.227 | 0.6337 | |
History of prior revision surgery | 1 (3%) | 4 (44%) | 15.361 | 0.0001 | |
Presence of sinus tract | 8 (26%) | 6 (67%) | 4.575 | 0.0324 |