Table 2.

Comparison of models where protection from infection depends on antibody titre and antibody avidity, titre or avidity alone and a model including an interaction term. The ranking of models by DIC highlights the finding that the data is best explained by a model that includes both anti-NANP antibody titre and avidity index without an interaction term.

Model	Difference in DIC compared to best fitting model
Antibody titre, Avidity	0.000
Avidity only	2.049
Antibody titre, Avidity with an Interaction term	2.069
Antibody titre only	12.57