Median KIM-1 values were 0.152 (range 0.113–0.512), 0.165 (range 0.038–0.540), 0.150 (range 0.037–0.448) and 0.140 (range 0.067–0.448) in cats with IRIS stage 1, 2, 3 and 4 CKD, respectively (Figure 1). This evidence concerns the gene HAVCR1 and chronic kidney disease.