Table 2

Correlations for associations between the change ratio for working memory and change in imaging measures, and partial correlations controlling for age

MDFAMDFA
Normalised peak height frequencyr = −0.329r = 0.077r = −0.346r = 0.085
p = 0.005p = 0.523p = 0.004p = 0.490
Peak height intensityr = −0.125r = −0.183r = −0.118r = −0.180
p = 0.298p = 0.126p = 0.336p = 0.142
Skewnessr = −0.252r = 0.019r = −0.270r = 0.019
p = 0.034p = 0.872p = 0.026p = 0.879
Kurtosisr = −0.292r = −0.034r = −0.306r = −0.036
p = 0.013p = 0.777p = 0.011p = 0.771
Medianr = 0.025r = −0.118r = 0.035r = −0.113
p = 0.839p = 0.327p = 0.775p = 0.359
MDFAMDFA
Normalised peak height frequencyr = −0.329r = 0.077r = −0.346r = 0.085
p = 0.005p = 0.523p = 0.004p = 0.490
Peak height intensityr = −0.125r = −0.183r = −0.118r = −0.180
p = 0.298p = 0.126p = 0.336p = 0.142
Skewnessr = −0.252r = 0.019r = −0.270r = 0.019
p = 0.034p = 0.872p = 0.026p = 0.879
Kurtosisr = −0.292r = −0.034r = −0.306r = −0.036
p = 0.013p = 0.777p = 0.011p = 0.771
Medianr = 0.025r = −0.118r = 0.035r = −0.113
p = 0.839p = 0.327p = 0.775p = 0.359
  • Results for a number of different parameters derived from the diffusion tensor imaging histogram are shown.

  • Values in bold type indicate statistical significance.

  • MD, mean diffusivity; FA, fractional anisotropy; WMH, white matter hyperintensity.