Table 2.

Neuropsychological data from the subject groups at the approximate time of imaging

TestControlsADSDANOVA p value
Values are mean (±SD).
* Maximum scores are in parenthesis.
† Logical memory (immediate and delayed story recall from the Wechsler Memory Scale–Revised).29
a AD group worse than other two groups on Tukey test (p < 0.05).
b Semantic dementia (SD) group worse than other two groups on Tukey test (p < 0.05).
c AD and SD groups both worse than control group on Tukey test (p < 0.05).
d SD group worse than AD group on Tukey test (p < 0.05).
NT = not tested.
National Adult Reading Test predicted IQ114.6 (11.2)107.6 (11.5)85.4 (9.9)<0.05b
Episodic memory
    Rey recall (36*)19.6 (5.2)3.9 (4.6)12.6 (9.0)<0.0005ac
    Logical memory (23*)
        Immediate recall10.2 (4.7)3.1 (2.7)4.2 (4.8)<0.0005c
        Delayed recall8.0 (4.6)0.4 (0.9)2.6 (4.1)<0.0005c
    Recognition memory test
        Word short version (25*)24.8 (0.6)16.8 (2.7)20.2 (3.7)<0.0005ac
        Faces short version (25*)24.3 (0.8)20.2 (3.1)19.8 (3.6)<0.0005c
Semantic memory
    Category fluency47.5 (18.7)32.5 (12.2)15.9 (13.9)<0.0005cd
    Naming (64*)62.6 (1.1)57.7 (7.1)29.1 (23.4)<0.0005b
    Pyramids and palm trees semantic association test
        Word version (52*)51.2 (1.1)49.8 (2.4)39.4 (8.8)<0.0005b
        Picture version (52*)NT49.5 (2.7)40.1 (9.2)<0.0005d