TABLE 2.
The results of multilevel logistic regression models examining the associations between processing stage and season on the odds of samples having transconjugants that have ESC, ESBL, and non-ESBL phenotypesa
| Stratification parameters | ESCb |
ESBLc |
Non-ESBLd |
||||||
|---|---|---|---|---|---|---|---|---|---|
| OR | 95% CI | P value | OR | 95% CI | P value | OR | 95% CI | P value | |
| Processing stage | |||||||||
| Digested | Referent | Referent | Referent | ||||||
| Raw | 9.05 | 2.12, 38.69 | 0.003 | 3.53 | 1.16, 10.73 | 0.026 | 2.52 | 0.97, 6.54 | 0.057 |
| Variance components | Variance (VPCe) | 95% CI | Variance (VPCe) | 95% CI | Variance (VPCe) | 95% CI | |||
| Farm | 1.38 (15.3%) | 0.10, 18.24 | 3.80 (34.0%) | 0.56, 26.03 | 1.40 (28.9%) | 0.23, 8.44 | |||
| Farm on date of sampling | 4.33 (48.1%) | 0.91, 20.58 | 4.08 (36.5%) | 1.01, 16.53 | 0.16 (3.3%) | 5.25 × 10−6, 4.98 × 103 | |||
a
Phenotypes of transconjugants were determined by ESBL confirmation assay and binned into either ESBL or non-ESBL phenotypes. OR, odds ratio.
b
ESC, samples yielding transconjugants of any phenotypes: ESBL, non-ESBL, or both.
c
ESBL, samples yielding ESBL phenotype transconjugants.
d
Non-ESBL, samples yielding non-ESBL phenotype transconjugants.
e
Variance partition coefficients (VPC) estimated using the latent variable technique.