Table 5.
Logistic regression models showing variation in the probability for an ESBL/AmpC E. coli isolate (n = 69) of being resistant to specific antimicrobials in relation to the presence of selected resistance genes. Only models with at least one significant explanatory variable are reported. Cefoxitin (FOX), cefotaxime/clavulanic acid (F/C), and ceftazidime/clavulanic acid (T/C).
| Antimicrobial | Gene | Parameter Estimate ± SE | X21 | p-Value |
|---|---|---|---|---|
| FOX | bla CMY | 1.15 ± 0.58 | 3.87 | 0.049 |
| bla CTX-M | −1.15 ± 0.60 | 3.73 | 0.054 | |
| bla TEM | −0.57 ± 0.48 | 1.37 | 0.24 | |
| bla SHV | −1.25 ± 1.08 | 1.34 | 0.25 | |
| F/C | bla CMY | 1.39 ± 0.61 | 5.19 | 0.023 |
| bla CTX-M | −0.75 ± 0.64 | 1.38 | 0.24 | |
| bla TEM | −0.56 ± 0.48 | 1.39 | 0.24 | |
| bla SHV | −0.81 ± 1.08 | 0.56 | 0.45 | |
| T/C | bla CMY | 1.33 ± 0.61 | 4.75 | 0.029 |
| bla CTX-M | −1.30 ± 0.85 | 2.33 | 0.13 | |
| bla TEM | −1.13 ± 0.73 | 2.40 | 0.12 | |
| bla SHV | −1.36 ± 1.25 | 1.19 | 0.28 |