CALCA and Alzheimer disease: Fisher’s Least Significant Difference (LSD) post hoc tests showed a significantly lower KC density in AD patients (X = 0.47; SE = 0.06) compared to MD-MCI patients (X = 0.81; SE = 0.03; p = 0.007), SD-MCI patients (X = 0.79; SE = 0.1; p = 0.01) and HCs (X = 0.82; SE = 0.07; p = 0.0008).