Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Improvement in bulimia symptoms
Systematic review	262 people with bulimia nervosa 2 RCTs in this analysis	Frequency of binge eating at the end of treatment with CBT for bulimia nervosa (CBT-BN) with interpersonal psychotherapy (IPT; 19 sessions over 20 weeks) Absolute results not reported	SMD –0.24 95% CI –0.48 to +0.01		Not significant
Systematic review	257 people with bulimia nervosa 2 RCTs in this analysis	Frequency of binge eating at follow-up with CBT-BN with IPT (19 sessions over 20 weeks) Absolute results not reported	SMD –0.04 95% CI –0.29 to +0.20		Not significant
Abstinence
Systematic review	295 people 2 RCTs in this analysis	Abstinence from binge eating at the end of treatment with CBT-BN with IPT (19 sessions over 20 weeks) Absolute results not reported	RR 1.29 95% CI 1.15 to 1.49	Small effect size	CBT-BN
Systematic review	220 people Data from 1 RCT	Abstinence from purging at the end of treatment with CBT-BN with IPT (19 sessions over 20 weeks) Absolute results not reported	RR 1.32 95% CI 1.15 to 1.49	Small effect size	CBT-BN
Systematic review	295 people 2 RCTs in this analysis	Abstinence from both binge eating and purging 1 year with CBT-BN with IPT (19 sessions over 20 weeks) Absolute results not reported	RR 1.08 95% CI 0.94 to 1.22		Not significant