Models fit and nested model comparisons made using the likelihood ratio test (chi-squared test, df = degrees of freedom).

Models are specified by their logistic and linear components, with “A” indicating a term for animal was in the model component, “V” indicating a term for virus was in the model component, and “I” the interaction between animal and virus was in the model component. For convenience, model labels are given in the first column (Model), and the nested/reduced model being compared to that is given as the Comparator Model, referenced by the Model label of column one. P-values模型由其逻辑回归分量与线性分量所定义：其中"A"表示模型分量中包含动物相关变量项，"V"表示模型分量中包含病毒相关变量项，"I"则表示模型分量中包含动物与病毒的交互项。为便于使用，第一列（Model）标注了模型标签，待与该模型进行比较的嵌套/简化模型以Comparator Model命名，并通过第一列的模型标签进行引用。P值