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Self-help manuals may reduce bingeing and purging in bulimia nervosa
  1. Zenobia C Y Chan, RN, MPHC, PhD, Candidate
  1. Department of Social Work
 The Chinese University of Hong Kong

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 QUESTION: Do self help manuals improve symptoms in people with bulimia nervosa?

    Design

    Randomised controlled trial.

    Setting

    Specialist hospital clinic, Toronto, Canada.

    Participants

    85 women with bulimia nervosa (93% with the purging subtype), mean age 27 years (range 17–53 years), waiting for treatment at a hospital clinic. Exclusion criteria were: previous specialist treatment for bulimia nervosa; bingeing or purging symptoms less than once a week; body mass index less than 18; other medical conditions, or pregnancy.

    Intervention

    8 weeks of treatment with: self-help manual on cognitive-behavioural skills specifically designed for bulimia nervosa (cognitive-behaviour manual); non-specific self-help manual on self-assertiveness skills (unguided self help manual), or waiting list control.

    Main outcome measures

    Response was defined as a 50% or greater reduction in frequency of binge eating or purging as assessed by the Eating Disorders Examination interview.

    Main results

    20 participants did not complete the study. Intention-to-treat analysis found that either self-help intervention increased response rate compared with control. However, results did not reach statistical significance, perhaps due to a lack of study power (response rate: 54% with cognitive behaviour manual; 50% with unguided self-help manual; 31% with control; p=0.10 for cognitive behaviour manual v control; p=0.08 for unguided self-help manual v control).

    Conclusions

    Self-help manuals may benefit people with bulimia nervosa.

    Commentary

    Alternative approaches to healing bulimia nervosa should be promoted. Self-help is one such approach, which provides advantages in terms of economics, accessibility, delivery and empowerment of the patient.1–2 With these assumptions, Carter et al conducted a pioneering, randomised, controlled trial study of the effectiveness of a self-help approach at the initial stage of treatment for clients suffering from bulimia. The implications of this study for clinical practice are three-fold.

    First, shifting from an expert-led to client-led ideology and modality for treating bulimia highlights the importance of empowerment and participation of patients in the management of bulimic symptoms. This is the core insight gained from the research. Second, user-friendly self-help manuals for patients can be substituted in place of more expensive psychiatric or other professional services. Finally, benefits of teaching both cognitive behaviour self-help skills and self-assertion skills are similar. This suggests the potential of non-specific self-help skills to minimise the symptoms of bulimia while the patient is waiting for psychiatric treatment. This study also provides guidelines and ready-made resources for primary treatment personnel - including general practitioners, social workers, nurses and teachers - when they are faced with bulimic patients awaiting formal mental health services.

    References

    View Abstract

    Footnotes

    • Sources of funding: The Dean’s Fund, Faculty of Medicine, University of Toronto.

    • Correspondence to: Dr Carter, Department of Psychiatry, Toronto General Hospital, 200 Elizabeth St, Eaton Wing, 8–231, Toronto, Ont. M5G 2C4 Canada. email: jacqueline.carter{at}uhn.on.ca

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