In children < 8years of age at diagnosis , a marginally significant trend toward higher VIQ was found in those treated in the HFRT arm ; a similar trend was found for PSI but not for PIQ , WMI , or FSIQ ( mean intergroup differences were : 12.02 for VIQ [ 95 % CI : 2.37-21 .67 ; P = .02 ] ; 3.77 for PIQ [ 95 % CI : -5.19 to 12.74 ; P > .10 ] ; 5.20 for WMI [ 95 % CI : -2.07 to 12.47 ; P > .10 ] ; 10.90 for PSI [ 95 % CI : -1.54 to 23.36 ; P = .08 ] ; and 5.28 for FSIQ [ 95 % CI : -4.23 to 14.79 ; P > .10 ] ) .