Demographic and clinical characteristics of the AD patients and Braak 0 subjects.

a)Classification to mild, moderate and severe according to Braak staging; 1–2 = mild, 3–4 = moderate, 5–6 = severe. Braak stage 0 = subjects without neurofibrillary pathology.b)There were no significant differences in the age of death between mild, moderate, and severe groups in the AD cohort.c)Post-mortem delay; significant difference in the post-mortem delay between mild and severe groups (p = 0.013).d)MMSE = Mini-Mental State Examination.