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).