In the intent-to-treat population ( n = @ ) , there was a prolongation by WBRT of both PFS ( @ vs @ months , HR @ -LSB- @ % CI @-@ @ -RSB- , p = @ ) and PFS from last HDMTX ( @ vs @ months , HR @ -LSB- @ % CI @-@ @ -RSB- , p = @ ) , but not of OS ( @ vs @ months , HR @ -LSB- @ % CI @-@ @ -RSB- , p = @ ) .