Meta-analysis of cognitive-behavioral treatment studies for bulimia

Author(s): Gebing, T. A., Anthony, J. L., OBrien, W. H.

Journal/Book: Clin Psychol Rev. 1997; 17: The Boulevard, Langford Lane, Kidlington, Oxford, England OX5 1GB. Pergamon-Elsevier Science Ltd. 703-718.

Abstract: A meta-analysis was performed to systematically assess the effect of cognitive-behavioral treatments for bulimia. To protect against past criticisms of meta-analyses, this study focused on well-defined hypotheses with clearly articulated conceptual foundations. Twenty-six studies of the cognitive-behavioral treatment of bulimia were selected through computer searches. Effect sizes were calculated for changes in behavioral outcome measures (25 independent hypothesis tests) and cognitive-attitudinal outcome measures (17 independent hypothesis tests). Additionally, two effect sizes were generated for within and between group comparisons. The analysis revealed an effect size of average r = 0.69 for behavioral outcome measures (average r = 0.64 for between group and average r = 0.74 for within group) and average r = O.67 for cognitive-attitudinal outcome measures (average r = 0.64 for between group and average r = 0.69 for within group). Follow-up effect sizes were less favorable; however the diversity of time spans and outcome measures used to calculate follow-up effect sizes limit their utility. Overall, results suggest that the use of a cognitive-behavioral therapy will result in favorable treatment outcomes and implications for future research are discussed.

Note: Article Lewandowski LM, Bowling Green State Univ, Dept Psychol, Bowling Green,OH 43403 USA

Keyword(s): PSYCHOLOGICAL TREATMENTS; RESPONSE-PREVENTION; GROUP-THERAPY; NERVOSA; PSYCHOTHERAPY; INTERVENTIONS; EFFICACY

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