TABLE 6.
Significant OR between E. coli drug resistance phenotypes and 95% CIs
| Resistance phenotype (drug)
|
Outcome-predictor association
|
|||
|---|---|---|---|---|
| Outcome | Predictor | ORa | 95% CI | P |
| Ampicillin | Streptomycin | 2.8 | 1.6-4.7 | 0.0002 |
| Tetracycline | 11.0 | 3.4-35.3 | 0.0001 | |
| Trimethoprim-sulfamethoxazole | 3.5 | 1.1-10.4 | 0.03 | |
| Kanamycin | Streptomycin | 2.6 | 1.3-5.0 | 0.01 |
| Streptomycin | Ampicillin | 3.2 | 1.8-5.8 | 0.0001 |
| Kanamycin | 3.0 | 1.1-8.4 | 0.04 | |
| Tetracycline | * | <.0001 | ||
| Sulfamethoxazole | 2.0 | 1.2-3.4 | 0.01 | |
| Tetracycline | Ampicillin | 16.6 | 3.9-70.7 | 0.0001 |
| Streptomycin | * | <.0001 | ||
| Sulfamethoxazole | 7.8 | 3.9-15.7 | 0.0001 | |
| Sulfamethoxazole | Streptomycin | 1.9 | 1.1-3.3 | 0.02 |
| Tetracycline | 8.4 | 4.3-16.4 | 0.0001 | |
| Trimethoprim-sulfamethoxazole | * | <.0001 | ||
| Chloramphenicol | * | <.0001 | ||
| Trimethoprim-sulfamethoxazole | Ampicillin | 3.5 | 1.2-10.1 | 0.02 |
| Sulfamethoxazole | * | <.0001 | ||
| Chloramphenicol | Sulfamethoxazole | * | <.0001 | |
a
The asterisk indicates that the OR could not be estimated because no isolates demonstrated one of the combinations of resistance and susceptibility (i.e., 0-0, 0-1, 1-0, or 1-1 [see text]) (nonparametric Fisher's exact test).