RESEARCH COMMUNICATIONS OF THE 28th ECVIM-CA CONGRESS

The first aid (Version 1) comprised a 6‐box grid arranged in 2 columns of 3 including a list of relevant observations. One column recorded observations known to support a diagnosis of HAC (e.g. thin skin, polyuria, polydipsia, positive adrenal function test) and the other those that would support non‐adrenal‐illness (NAI; e.g. significant weight loss, absence of stress leukogram, reference interval alkaline phosphatase activity, negative low‐dose‐dexamethasone suppression test (LDDST)). The rows divided observations conveying mild, moderate or strong support for the respective diagnosis. The second aid (Version 2) included author‐opinion‐based numeric weightings for specific observations allowing calculation of a score indicating whether HAC was likely, unlikely or equivocal. Initial cut‐offs were derived from a small development dataset (n=19).