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Final multivariable model of risk factors associated with CTX-M-type β-lactamase positivity in patients with clinical cultures with E. coli
| Variable | OR (95% CI) | P |
|---|---|---|
| Urinary source | 0.36 (0.17–0.77) | 0.008 |
| Charlson comorbidity score | 1.11 (0.95–1.30) | 0.20 |
| Receipt of an extended-spectrum penicillin ≤30 days prior to the culture date | 7.36 (1.61–33.8) | 0.01 |
