Table 1.

Demographic characteristics of the patient groups

Patient groupa	Sex (f/m)	Age (years)	Symptom duration (years)b	Follow-up duration (years)c	Education (years)d	MMSE scoree	Consistency with AUC (yes/no)	Hippocampal atrophy (yes/no)f
All	41/43	66.9 (8.2)	2.7 (2.2)	2.5 (1.4)	13.5 (3.4)	22.3 (4.6)	69/15	13/44
AD	19/22	65.8 (7.5)	2.7 (2.1)	2.8 (1.3)	13.8 (3.7)	21.2 (4.5)g	27/14	8/16
Non-ADh	22/21	67.9 (8.8)	2.8 (2.3)	2.2 (1.4)	13.2 (3.1)	23.5 (4.4)	41/1	5/28

Data are given as mean values (standard deviation)

AD Alzheimer’s disease, MMSE Mini-Mental State Examination, AUC Appropriate Use Criteria

^aAccording to baseline clinical diagnosis

^bBefore PET

^cAfter PET

^dAvailable in 73 patients

^eAvailable in 79 patients. The MMSE score at the time of PET was not properly archived in five patients

^fHippocampal atrophy indicated on MRI in those patients who underwent MRI at baseline

^gMMSE scores were 20.5 ± 4.2 in patients with early-onset AD and 21.8 ± 4.7 in those with late-onset AD (p = 0.354, t test), and 22.9 ± 4.6 in patients with early-onset non-AD and 23.8 ± 4.4 in those with late-onset non-AD (p = 0.558, t test)

^hMajor neurocognitive disorder due to non-AD aetiology