Independent-Samples T-tests showed no significant differences in IL-4:IL-10 between dogs with confirmed CE and detectable IL-4 concentrations and dogs with non-GI causes and detectable IL-4 concentrations (P-value 0.147, confirmed CE: mean 10.25, standard deviation 22.36; non-GI causes: mean 1.68, standard deviation 1.63). This evidence concerns the gene IL4 and cholesteryl ester measurement.