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    Theory of planned behavior and adherence in chronic illness: a meta-analysis

    230858_230858.pdf (542.2Kb)
    Access Status
    Open access
    Authors
    Rich, A.
    Brandes, K.
    Mullan, Barbara
    Hagger, Martin
    Date
    2015
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Rich, A. and Brandes, K. and Mullan, B. and Hagger, M. 2015. Theory of planned behavior and adherence in chronic illness: a meta-analysis. Journal of Behavioral Medicine. 38 (4): pp. 673-688.
    Source Title
    Journal of Behavioral Medicine
    DOI
    10.1007/s10865-015-9644-3
    ISSN
    0160-7715
    School
    School of Psychology and Speech Pathology
    Remarks

    The final publication is available at Springer via http://doi.org/10.1007/s10865-015-9644-3

    URI
    http://hdl.handle.net/20.500.11937/4544
    Collection
    • Curtin Research Publications
    Abstract

    Social-cognitive models such as the theory of planned behavior have demonstrated efficacy in predicting behavior, but few studies have examined the theory as a predictor of treatment adherence in chronic illness. We tested the efficacy of the theory for predicting adherence to treatment in chronic illness across multiple studies. A database search identified 27 studies, meeting inclusion criteria. Averaged intercorrelations among theory variables were computed corrected for sampling error using random-effects meta-analysis. Path-analysis using the meta-analytically derived correlations was used to test theory hypotheses and effects of moderators. The theory explained 33 and 9 % of the variance in intention and adherence behavior respectively. Theoretically consistent patterns of effects among the attitude, subjective norm, perceived behavioral control, intention and behavior constructs were found with small-to-medium effect sizes. Effect sizes were invariant across behavior and measurement type. Although results support theory predictions, effect sizes were small, particularly for the intention-behavior relationship.

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