Demographic data of included subjects.

Data are the mean (± standard deviation) or number (%).Only P-valuesaPbPAbbreviations: Stable MCI, patients with MCI with stable cognitive functions during a follow-up period of 5.2 years; MCI-AD, patients with MCI who developed Alzheimer's disease during follow-up; MCI-other, patients with MCI who developed other types of dementia during follow-up; CSF, cerebrospinal fluid; APOE, apolipoprotein E; MMSE, Mini-Mental State Examination.