Table 1.

Demographic data for early- and late-onset Alzheimer’s disease groups and healthy control participants.

Participant Group	Age (years)	Gender	Education (years)	Years Post- Diagnosis	MMSE Score	Word Count
Early-onset AD	45	Female	12	3	7	235
	53	Male	11	3	16	314
	55	Female	12	3	13	390
	56	Female	16	3	20	465
	60	Female	13	4	17	305
Early-onset AD Mean (and SD)	53.80 (5.54)	-	12.80 (1.92)	3.20 (0.44)	14.60 (4.92)
Late-onset AD	81	Female	12	3	16	1090
	82	Male	12	5	20	584
	84	Female	8	1.5	20	652
	86	Female	8	4	18	466
	89	Female	8	3	18	876
	91	Male	8	3.5	20	935
Late-onset AD Mean (and SD)	85.50 (3.94)	-	9.33 (2.07)	3.33 (1.17)	18.67 (1.63)
Healthy Control	46	Female	18	-	-	362
	56	Male	12	-	-	519
	61	Male	16	-	-	431
	77	Male	16	-	-	242
	78	Female	18	-	-	1027
Healthy Control Mean (and SD)	63.60 (13.79)	-	16.00 (2.45)	-	-

Note: MMSE scores range from 0 to 30 with “normal” being 24–30, mild cognitive impairment ranging from 20 to 23, moderate cognitive impairment between 10 and 19 and severe cognitive impairment ranging from 0 to 9.