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Table 1: 
Course of mean fractional anisotropy at different anatomic sites (n = 16)
VariableT0, Mean ± SDT1, Mean ± SDP*†T2, Mean ± SDP†P‡
CB.173 ± .021.161 ± .020.000.159 ± .016.002.000
FWM.466 ± .063.452 ± .056.003.442 ± .061.000.000
CR.490 ± .035.472 ± .044.000.463 ± .041.000.000
BS.420 ± .048.424 ± .043.776.434 ± .040.121.305
  • Note:—CB indicates bilateral cerebellar white matter; FWM, bilateral frontal white matter; CR, bilateral corona radiata; BS, brain stem; 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).