Table 1.

Demographic and cognitive screening results for the four study populations^a

	Controls	Cognitively Frail	MCI	Alzheimer
Group size (female)	38 (17 F)	26 (14 F)	15 (4 F)	11 (6 F)
Age (yr)	72.19 ± 8.88	79.98 ± 9.50	75.54 ± 7.60	74.53 ± 11.17
Education (yr)	14.97 ± 3.86	11.07 ± 2.88	16.68 ± 4.99	11.55 ± 3.54
Hearing left (dB)	51.92 ± 13.32	44.15 ± 16.06	52.88 ± 14.77	54.80 ± 10.01
Hearing right (dB)	53.55 ± 12.44	43.38 ± 16.35	57.63 ± 9.40	50.00 ± 12.01
MMSE (/30)	28.34 ± 1.47	26.07 ± 2.28	26.37 ± 2.73	23.20 ± 2.78
ACE-R (/100)	93.71 ± 3.04	80.92 ± 6.01	83.68 ± 8.41	68.6 ± 8.11
ACE-R memory (/26)	23.63 ± 1.94	18.38 ± 3.69	16.81 ± 6.09	10.7 ± 3.43
Training test (/100)	65.78 ± 23.55	50.96 ± 20.59	44.16 ± 24.02	37.50 ± 27.95

^aMCI, Symptomatic MCI after secondary/tertiary memory clinic assessment (for comparisons between groups, see Fig. 2B).