Table 1.

Global- and tract-specific associations between Symbol Span Raw Score and diffusion metrics obtained using partial correlations that controlled for agea

TractfaxonDaxonRDextraADextraFARDAD
Global white matter0.544* (0.019)0.389 (0.111)0.242 (0.334)0.456 (0.057)0.192 (0.446)−0.155 (0.540)0.064 (0.801)
Left cingulum0.542* (0.020)0.385 (0.115)0.264 (0.290)0.555* (0.017)0.362 (0.139)−0.211 (0.400)0.511* (0.030)
Right cingulum0.655** (0.003)0.501* (0.034)0.198 (0.432)0.611** (0.007)0.470* (0.049)−0.299 (0.229)0.461 (0.054)
Splenium of corpus callosum0.538* (0.021)0.478* (0.045)0.127 (0.615)0.374 (0.126)0.161 (0.522)−0.095 (0.709)0.141 (0.577)
Genu of corpus callosum0.347 (0.158)0.368 (0.133)0.041 (0.872)0.189 (0.453)0.082 (0.748)−0.125 (0.620)−0.094 (0.710)
Left inferior longitudinal fasciculus0.613** (0.007)0.594** (0.009)0.302 (0.223)0.474* (0.047)0.249 (0.319)−0.062 (0.805)0.293 (0.238)
Left inferior occipitofrontal fasciculus0.559* (0.018)0.477* (0.045)0.326 (0.187)0.456 (0.057)0.137 (0.589)−0.013 (0.960)0.293 (0.239)
Left superior longitudinal fasciculus0.616** (0.006)0.471* (0.049)0.326 (0.187)0.379 (0.121)0.184 (0.464)−0.173 (0.493)0.048 (0.850)
Right superior longitudinal fasciculus0.484* (0.042)0.224 (0.371)−0.018 (0.944)0.174 (0.490)0.225 (0.369)−0.308 (0.214)−0.113 (0.656)
Left uncinate fasciculus0.412 (0.089)0.426 (0.078)0.322 (0.193)0.339 (0.168)0.136 (0.589)−0.028 (0.911)0.476* (0.046)
  • ap values are listed in parentheses.

  • *p < 0.05;

  • **p < 0.01 (significant correlations).