DTI Parameters and distribution characteristics (n = 20)
| Mean ± SD (CI 95%) | Median (Range) | Skewness (P Value) Kurtosis (P Value) | D’AP Test for Non-normality | |||||
|---|---|---|---|---|---|---|---|---|
| 1st | 2nd | 1st | 2nd | 1st | 2nd | 1st | 2nd | |
| FA left | 247 ± 26(235–259) | 245 ± 27(232–257) | 249(195–298) | 251(176–287) | −0.16 (.74)−0.44 (.50) | −0.75 (.14)0.78 (.34) | P = .76 | P = .21 |
| FA right | 228 ± 20(219–238) | 229 ± 20(219–238) | 225(189–262) | 227(201–262) | 0.12 (.81)−0.81 (.33) | 0.12 (.81)−1.36 (.17) | P = .60 | P = .39 |
| FA mean | 238 ± 16(230–245) | 237 ± 19(228–246) | 239(201–266) | 237(195–268) | −0.28 (.57) 0.15 (.69) | −0.29 (.55)0.07 (.76) | P = .79 | P = .80 |
| MD left | 782 ± 46(760–803) | 781 ± 35(765–798) | 793(717–857) | 790(729–835) | 0.02 (.97)−1.34 (.18) | −0.08 (.86)−1.24 (.20) | P = .41 | P = .43 |
| MD right | 769 ± 27(756–782) | 769 ± 24(758–780) | 779(709–805) | 770(732–817) | −0.50 (.31)−0.74 (.36) | 0.48 (.33)−0.08 (.75) | P = .39 | P = .59 |
| MD mean | 775 ± 30(761–790) | 775 ± 25(763–787) | 774(727–819) | 780(731–825) | −0.17 (.72)−1.21 (.21) | −0.04 (.93)−0.78 (.34) | P = .42 | P = .63 |
Note.— FA indicates fractional anisotropy (×103); MD, mean diffusivity (μm2/s); CI 95%, 95% confidence interval of mean; D’AP test, D’Agostino-Pearson test for deviation of an empirical frequency distribution from normal distribution (P < .05 indicating significant deviation).