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Table 4 Size measurements (mm) for the abnormal and normal lumbosacral nerves

From: Identifying lumbosacral plexus nerve root abnormalities in patients with sciatica using 3T readout-segmented echo-planar diffusion weighted MR neurography

Anatomical structures

Axis

Abnormal nerves

Normal nerves

Ratio (abnormal/normal)

L5 nerve (n = 22)

AP

4.5 (± 1)*

3 (± 1)

1.5 (± 0.4)

 

Trans

7 (± 2)*

5.7 (± 1)

1.2 (± 0.3)

S1 nerve (n = 19)

AP

4.1 (± 1)*

3.1 (± 1)

1.3 (± 0.3)

 

Trans

6.8 (± 1)*

5.4 (± 1)

1.3 (± 0.3)

S2 nerve (n = 7)

AP

3.8 (± 1)

2.7 (± 1)

1.4 (± 0.2)

 

Trans

6.4 (± 1)

5.7 (± 1)

1.1 (± 0.1)

Sciatic nerve (n = 4)

AP

3.3 (± 1)

2.8 (± 1)

1.2 (± 0.1)

 

Trans

5.7 (± 1)

4.8 (± 1)

1.2 (± 0.1)

  1. Mean (± SD) of nerve size shown by axis orientation and anatomical structure, and p values from Wilcoxon signed-rank tests were corrected for 8 tests
  2. AP = Anteroposterior; Trans = Transverse
  3. *Bonferroni-adjusted p value < 0.05 when the abnormal nerve was compared to the normal nerve