Table 2.

Final multivariable regression models evaluating the unique cognitive correlates of total immediate recall during learning trials within diagnostic groups (covarying for age, sex, and Mini Mental Status Exam).

	Adj. R2	F	Total df	VIF	Std. β	Partial r	p-value
Neurologically Normal Older Adults
Model	0.36	3.2	28				0.02
Aud Working Memory				1.9	0.18	0.09	0.40
Executive Control				2.6	0.19	0.07	0.43
Verbal Processing Speed				2.5	0.09	0.10	0.71
Visual Delayed Recall				1.8	0.41	0.24	0.055
Alzheimer’s Disease
Model	0.30	15.8	240				< 0.001
Semantic Processing				1.3	0.21	0.20	< 0.001
Lexical Fluency				1.3	0.0.09	0.13	0.14
Echoic Recall				1.2	0.20	0.20	< 0.001
Executive Control				1.3	0.12	0.12	0.051
Logopenic variant PPA
Model	0.46	3.3	21				0.03
Semantic Processing				2.9	0.31	0.29	0.28
Echoic Recall				2.6	0.01	0.01	0.97
Executive Control				1.8	0.18	0.19	0.40
Processing Speed				1.6	0.15	0.15	0.47
Visual Delayed Recall				1.3	0.43	0.47	0.03
Behavioral variant Frontotemporal Dementia
Model	0.72	9.96	32				< 0.001
Semantic Processing				1.5	0.35	0.49	0.008
Lexical Fluency				2.3	0.02	0.16	0.84
Echoic Recall				2.4	0.39	0.40	0.02
Aud Working Memory				2.1	0.18	0.10	0.20
Executive Control				1.9	0.14	0.23	0.28
Verbal Processing Speed				3.2	−0.01	−0.18	0.99
Semantic variant PPA
Model	0.39	6.5	42				< 0.001
Semantic Processing				1.9	0.60	0.38	< 0.001
Verbal Processing Speed				1.7	0.01	0.02	0.93
Nonfluent variant PPA
Model	0.26	2.4	32				0.048
Semantic Processing				4.1	0.51	0.23	0.11
Lexical Fluency				3.5	0.11	0.15	0.69
Executive Control				3.7	−0.11	−0.04	0.70
Verbal Processing Speed				4.5	−0.05	−0.03	0.87
Visual Delayed Recall				1.6	0.15	0.23	0.45

Note. PPA = primary progressive aphasia; Aud = auditory.