Table 2.
Correlations among cognitive tests and neuroimaging results (volumes and area)
| WBV | ICA | CCA | VV | RFL | LFL | RTL | LTL | RAHC | LAHC | |
| NART | .23* | .30** | .13 | .22* | .10 | -.01 | .15 | .13 | .19 | .24* |
| RSPM | .27** | .25* | .23* | .04 | .14 | .01 | .28** | .20 | .10 | .11 |
| MHT | .25* | .28** | .21* | .08 | .21* | .05 | .29** | .16 | .14 | .15 |
| VF | .15 | .13 | .15 | -.01 | .08 | .03 | .16 | .15 | .21* | .22* |
| LM | -.18 | -.03 | -.10 | .07 | -.02 | -.10 | -.18 | -.21* | -.09 | -.05 |
| g | .21* | .25* | .20 | .06 | .16 | .01 | .23* | .14 | .14 | .16 |
| g corr for NART | .11 | .11 | .15 | -.06 | .13 | .02 | .18 | .09 | .05 | .04 |
Partial correlation corrected for sex (df = 96). * P < .05 ** P < .01
n varies from 104 to 107 depending on cognitive test (Table 1) and n = 99 for g
WBV: whole brain volume, ICA: intracranial area, CCA: corpus callosum area, VV: ventricular volume, RFL: right frontal lobe volume, LFL: left frontal lobe volume, RTL: right temporal lobe volume, LTLV: left temporal lobe volume, RAHC: right amygdalo-hippocampal complex volume, LAHC: left amygdalo-hippocampal complex volume
NART: National Adult Reading Test, RSPM: Raven's Standard Progressive Matrices, MHT: Moray House Test, VF: Verbal Fluency, LM: Logical Memory
g: general cognitive factor (The first unrotated principal component of MHT, RSPM, VF and LM, accounting for 51.9% of the total variance: see text.)
g corr for NART: estimate of cognitive change (see text)