Table 2 Results of simulation study to determine the optimal bandwidth based on the signal size.

From: Spatial regression analysis of MR diffusion reveals subject-specific white matter changes associated with repetitive head impacts in contact sports

Signal Size

MTPs

Bandwidth

pValue.thresh

True positive

TPRate

False positive

FPRate

Small

BH

5

0.034

101

0.902

35

0.000

Small

WY

5

0.050

101

0.902

35

0.000

Medium

BH

10

3 × 10–4

1411

0.953

235

0.001

Medium

WY

10

1 × 10–3

1442

0.974

411

0.001

Large

BH

15

0.001

13,219

0.900

65,291

0.173

Large

WY

15

0.279

13,234

0.901

65,762

0.174

Large

BH

19

7.78 × 10–7

13,419

0.914

45,718

0.121

Large

WY

19

1 × 10–5

13,584

0.925

51,627

0.137

  1. MTP, multiple comparison procedure; pValue.thresh, p value considered significant change for a voxel; True Positive, number of true positives detected; TPRate, true positive rate; False Positive, the number of false positives detected; and FPRate, the false positive rate.
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