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Table 2 Between-group differences for DWI data quality measures and for FA per tract

From: Alterations in the inferior longitudinal fasciculus in autism and associations with visual processing: a diffusion-weighted MRI study

 

ASD (n = 17)

TD (n = 17)

F

p value

 

M

SD

M

SD

DWI data quality measures

 Average translation

1.4279

0.3591

1.4271

0.3597

0.00

0.995

 Average rotation

0.0130

0.0047

0.0114

0.0041

1.16

0.290

 Percentage of slices with drop-out

0.2781

0.4457

0.1903

0.6030

0.23

0.633

 Average signal drop-out score

1.0381

0.0437

1.0187

0.0332

2.12

0.155

Fractional anisotropy (FA) per tract

 R inferior longitudinal fasciculus *,°

0.4395

0.0259

0.4622

0.0293

5.74

0.023

 L inferior longitudinal fasciculus *

0.4561

0.0319

0.4779

0.0286

4.43

0.043

 R anterior thalamic radiations

0.3900

0.0261

0.4012

0.0208

1.94

0.173

 L anterior thalamic radiations

0.3928

0.0248

0.4033

0.0295

1.26

0.269

 R cingulum-angular bundle

0.3131

0.0351

0.2983

0.0215

2.21

0.147

 L cingulum-angular bundle

0.2953

0.0379

0.2880

0.0303

0.38

0.541

 R cingulum-cingulate gyrus bundle

0.4161

0.0373

0.4302

0.0527

0.81

0.374

 L cingulum-cingulate gyrys bundle

0.4492

0.0468

0.4725

0.0596

1.61

0.214

 R corticospinal tract

0.5243

0.0196

0.5228

0.0397

0.02

0.888

 L corticospinal tract

0.5352

0.0230

0.5197

0.0307

2.79

0.105

 R superior longitudinal fasciculus—parietal

0.4037

0.0253

0.4103

0.0263

0.56

0.461

 L superior longitudinal fasciculus—parietal

0.4234

0.0485

0.4300

0.0381

0.19

0.662

 R superior longitudinal fasciculus—temporal

0.4711

0.0271

0.4816

0.0270

1.30

0.263

 L superior longitudinal fasciculus—temporal

0.4642

0.0304

0.4714

0.0274

0.52

0.477

 R uncinate fasciculus

0.4002

0.0247

0.4018

0.0276

0.03

0.862

 L uncinate fasciculus

0.3810

0.0247

0.3855

0.0244

0.28

0.603

 Forceps major (corpus callosum)

0.5252

0.0866

0.5326

0.0759

0.07

0.793

 Forceps minor (corpus callosum)

0.4976

0.0329

0.4938

0.0329

0.11

0.737

  1. Note. *p < .05, °group difference that survives Bonferroni correction (α = 0.05/18 = 0.0028), after outlier exclusion (F(1,30) = 12.40, p = .0014)
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Molecular Autism

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