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. 2008 Jul 18;74(17):5444–5450. doi: 10.1128/AEM.02664-07

TABLE 6.

Results of a two-level multivariate logistic regression analysis for farm factors associated with the prevalence of Yersinia pseudotuberculosis in herdsa

Variable Estimate Odds ratio 95% CI of odds ratio P
Constant −4.353 0.01 0.003-0.051 0.000
Birds have access to piggery 2.575 13.13 1.966-87.72 0.008
Number of mo that pigs have access to outdoor area 0.269 1.31 1.041-1.646 0.021
a

Herd variance (σ2farm), 1.660 (standard error = 1.016), P value = 0.103 (Wald test); intraclass correlation coefficient = 0.492. CI, confidence interval.