TABLE 4:
Inter-sequence and inter-imaging unit mean coefficients of variation (standard error of the means) for the λ1, λ2, and λ3 histogram-derived metrics
| Inter-Sequence (%) | Inter-Imaging Unit (%) | P* | |
|---|---|---|---|
| Average λ1 | 1.63 (0.1) | 4.13 (0.4) | <0.001 |
| λ1 peak height | 5.18 (0.6) | 6.93 (0.8) | n.s. |
| λ1 peak position | 1.78 (0.2) | 4.76 (0.6) | <0.001 |
| Average λ2 | 2.02 (0.3) | 5.39 (0.6) | <0.001 |
| λ2 peak height | 3.30 (0.3) | 4.37 (0.5) | n.s. |
| λ2 peak position | 1.50 (0.1) | 5.33 (0.6) | <0.001 |
| Average λ3 | 4.71 (0.5) | 6.80 (0.7) | 0.009 |
| λ3 peak height | 5.49 (0.6) | 6.89 (0.8) | n.s. |
| λ3 peak position | 6.06 (0.7) | 12.19 (1.1) | <0.001 |
Note.—λ1–λ3 = eigenvalues of the diffusion tensor; n.s., not significant.
*
Statistical analysis: comparisons were conducted by using a bootstrap resampling technique.