Table 1. Demographics and MRI data of the included sample.

Demographic variables	CN	MCI	AD
Number	317	416	599
Age (years)	74.18 ± 5.63	73.75 ± 7.40	74.64 ± 7.35
Sex (Male/Female)	157/160	256/160	354/245
Education (years)	16.50 ± 2.68	16.01 ± 2.90	15.53 ± 2.88
Hippocampal volume (ml)	3738.88 ± 445.46	3474.60 ± 529.06	3002.31 ± 538.27

Data are shown as mean ± standard deviation.

CN = cognitively normal, MCI = mild cognitive impairment, AD = Alzheimer’s disease.