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Table 11 Correlation between IQ and tract-specific measurements

From: White matter connectivity in children with autism spectrum disorders: a tract-based spatial statistics study

  Number of streamlines Length of streamlines Volume
  ASD Controls ASD Controls ASD Controls
  r value p value r value p value r value p value Statistic p value r value p value r value p value
CC -.005 .98 .26 .47 -.06 .79 .10 .77 .13 .56 .04 .91
Cing left .013 .95 -.22 .54 -.13 .55 .33 .34 .22 .31 .34 .27
Cing right .15 .49 -.09 .80 -.12 .61 .34 .34 .18 .42 .17 .63
DAF left -.17 .44 .39 .29 -.03 .88 .96 < .001** -.06 .79 .56 .12
DAF right -.35 .10 .41 .24 -.05 .82 -.17 .84 -.27 .19 -.14 .69
IAAF left .07 .75 .17 .64 .26 .23 -.08 .82 .19 .39 -.34 .34
IAAF right .10 .65 -.07 .84 .26 .24 .06 .87 .23 .30 .15 .68
IPAF left -.15 .50 .05 .89 .29 .17 .19 .56 -.05 .81 .52 .12
IPAF right .09 .66 -.28 .44 -.002 .99 .15 .69 .20 .35 -.03 .94
  Fractional anisotropy Mean diffusivity     
  ASD Controls ASD Controls     
  r value p value r value p value r value p value r value p value     
CC .03 .89 -.24 .51 -.18 .42 .04 .92     
Cing left -.23 .31 .38 .28 .10 .66 .02 .94     
Cing right -.20 .37 .07 .84 .33 .13 -.15 .68     
DAF left -.06 .83 .05 .89 -.36 .10 .06 .83     
DAF right -.05 .83 .06 .88 -.01 .98 .20 .60     
IAAF left .07 .75 -.39 .26 -.02 .91 -.81 .82     
IAAF right .10 .65 -.02 .95 -.01 .98 .43 .21     
IPAF left -.18 .41 -.09 .79 .10 .63 -.25 .48     
IPAF right .13 .55 -.08 .82 -.02 .92 .06 .87     
  Parallel diffusivity Perpendicular diffusivity     
  ASD Controls ASD Controls     
  r value p value r value p value r value p value r value p value     
CC -.13 .56 -.17 .63 -.12 .59 .23 .52     
Cing left -.14 .54 .66 .04* .19 .41 -.29 .42     
Cing right .19 .39 -.05 .89 -.18 .43 -.27 .44     
DAF left -.03 .89 .07 .84 .07 .75 .07 .84     
DAF right -.18 .47 -.13 .73 .05 .83 .19 .63     
IAAF left -.06 .79 -.39 .27 -.05 .82 -.17 .64     
IAAF right -.27 .23 .42 .23 -.34 .12 .33 .35     
IPAF left -.05 .81 -.20 .58 .16 .47 -.22 .55     
IPAF right -.34 .11 .001 .99 .14 .51 -.14 .69     
  1. ASD: Autism Spectrum Disorder; CC: corpus callosum; Cing: cingulum; DAF: direct segment of the arcuate fasciculus; IAAF: indirect anterior segment of the arcuate fasciculus; IPAF: indirect posterior segment of the arcuate fasciculus. r: Pearson’s correlation coefficient.
  2. * Statistically significant at the threshold uncorrected p < .05.
  3. ** Significance level at the threshold uncorrected p < .01.