Boxplot of multigroup comparisons of sirtuin-related RNA levels among the Huntington’s disease, Alzheimer’s disease (AD) and control groups in dataset GSE33000. At the top of the figure, sirtuin gene symbols indicate subgroup information; below, Kruskal-Wallis P-values among the Huntington’s disease, AD, and control groups are shown. At the bottom of the figure, boxes representing the sirtuin-related RNA expression values from the microarray are shown, and the post hoc subgroup comparison results are shown between the RNA expression boxes and Kruskal-Wallis P-values. **** P<0.0001, *** P<0.001, ** P<0.01, * P<0.05 and ns P≥0.05. ND indicates “no dementia” as the control group.