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Table 2: Course of mean fractional anisotropy, left and right hemisphere (n = 16)
Variable T0, Mean ± SD T1, Mean ± SD Δ, % P^* T2, Mean ± SD Δ (%) P^† P^‡
CB 
    Right .173 ± .023 .162 ± .019 −6.1 .000 .160 ± .017 −7.1 .007 .001
    Left .174 ± .021 .160 ± .023 −8.0 .000 .158 ± .019 −8.7 .001 .000
FWM 
    Right .470 ± .069 .456 ± .058 −2.5 .008 .441 ± .056 −5.6 .007 .000
    Left .463 ± .060 .449 ± .058 −3.0 .003 .442 ± .070 −4.8 .015 .011
CR 
    Right .489 ± .031 .473 ± .040 −3.3 .001 .459 ± .036 −6.2 .000 .000
    Left .492 ± .043 .470 ± .053 −4.6 .001 .466 ± .049 −5.2 .000 .000
Note:—CB indicates cerebellar white matter; FWM, frontal white matter; CR, corona radiata; T0, at baseline; T1, at the end of radiotherapy; T2, at 6 weeks after radiotherapy.
* P values are from Wilcoxon test (comparison between T0 and T1).
† P values are from Wilcoxon test (comparison between T0 and T2).
‡ P values are from Friedman test (comparison across time).