Classification tree produced using CART with target variable “CITT” (1 having at least one animal tested positive by CITT within the household; 0: not having animals tested positive by CITT within the household).

Abstract

<p>Classification tree representing the important factors influencing CITT positivity. Target variable is “CITT” (1 having at least one animal tested positive by CITT within the household; 0: not having animals tested positive by CITT within the household). The following variables were selected by the tree as important factors: herd size with a cut off of 19 cattle in the herd; Handling (quarantine: keeping newly arrived animals out of the herd – mixed: new animals mixed with the other animals); Animals chronic cough (0 = absence of animals with chronic cough in the herd and 1 = presence of animals with chronic cough).</p