For completers, CBT was more effective than IPT in reducing objective binge episodes (F1,121=11.9, P=.001) (ES=−0.72); purging (F1,121=20.7, P=.001) (ES=0.92); and dietary restraint (F1,122=10.76, P=.001) (ES=0.54), at the end of treatment, but not at any other time point (Table 3). At the end of treatment, binge eating was reduced by 86% for patients given CBT and by 51% for those given IPT (F1,122=6.5, P=.01) (ES=0.49); purging was reduced by 84% for the CBT group and by 50% for the IPT group (F1,122=22.1, P=.001) (ES=0.83). There were no significant differences between treatments at any point on any other measure. Twenty-one (66%) of the 32 who recovered with CBT at the end of treatment remained recovered at follow-up, compared with 4 (57%) of the 7 treated with IPT. For those remitted at the end of CBT (not including those who recovered), 6 (29%) of 21 recovered compared with 8 (33%) of the 24 in the IPT group. Of the remaining participants, 4 (7%) of 57 had recovered at follow-up in the CBT group, compared with 7 (9%) of 79 in the IPT group. During follow-up, 19 participants (29%) treated with CBT and 17 (27%) treated with IPT sought further treatment for their eating disorder. For CBT, 9 (14%) received some form of psychotherapy, 7 (10%) received medication, and 3 (5%) received a combination of psychotherapy and medication; for IPT, 3 (5%) received psychotherapy, 9 (14%) received medication, and 3 (8%) received combined treatment. A post hoc analysis excluding those who received treatment during follow-up found no significant differences between treatments during follow-up.