These treatment differences were maintained through the 12-month follow-up : for interviewer-assessed PTSD ( difference , 6.0 ; 95 % CI , 1.6-10 .4 ; P = .02 ) , loss of PTSD diagnosis ( difference , 31.1 ; 95 % CI , 14.7-34 .8 ; P = .01 ) , self-reported PTSD ( difference , 9.3 ; 95 % CI , 1.2-16 .5 ; P = .02 ) , depression ( difference , 7.2 ; 95 % CI , 1.4-13 .0 ; P = .02 ) , and global functioning ( difference , 11.2 ; 95 % CI , 4.5-17 .9 ; P = .01 ) .