CCK and Alzheimer disease: Pairwise comparisons using Šídák’s multiple comparisons post hoc test indicated that the TgF344-AD rats had significantly fewer CCK+ interneurons in the CA3 (p = 0.0014) and CA1 (p = 0.002) hippocampal subareas as well as in their entire hippocampus (p < 0.0001) (Figure 9A).