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Title: Health messages to promote fruit and vegetable consumption at different stages: a match-mismatch design
Authors: Godinho, C. A.
Alvarez, M.-J.
Lima, M. L.
Schwarzer, R.
Keywords: Fruit and vegetable intake
Health message targeting
Stages of change
Randomised controlled trial
Multiple mediation analyses
Issue Date: 2015
Publisher: Routledge/Taylor and Francis
Abstract: Objective: To examine the effectiveness of matching health messages promoting fruit and vegetable intake to the Health Action Process Approach stages of change.Design: In a randomised controlled trial, 205 undergraduate students (non-intenders n=123; intenders n=82) were exposed to one of three health messages, targeted at non-intenders, intenders and controls.Main outcome measures: Three longitudinal assessments of stage, fruit and vegetable intake, and social-cognitive determinants were obtained.Results: Stage-specific effects of the interventions were confirmed. For self-efficacy, a stage by health message crossover interaction emerged, with both non-intenders and intenders in the matched conditions scoring higher in self-efficacy. Furthermore, in line with predictions, non-intenders in the matched condition showed higher risk perception, outcome expectancies, intention, and stage progression immediately after message exposure, and lower levels of action planning and coping planning a week later in the mismatched condition, but for these outcomes no differences across conditions were obtained among intenders. Multiple mediation analyses confirmed the facilitating role of self-efficacy and behavioural intention among non-intenders.Conclusions: Stages should be considered when designing health messages, although more interactive interventions for intenders and extended measurement time frames may be required.
Peer reviewed: yes
DOI: 10.1080/08870446.2015.1054827
ISSN: 0887-0446
Accession number: WOS:000362124200002
Appears in Collections:CIS-RI - Artigos em revistas científicas internacionais com arbitragem científica

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