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A cluster randomised controlled trial of an intervention based on the Health Action Process Approach for increasing fruit and vegetable consumption in Iranian adolescents
Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hung Hom, Hong Kong.
Department of Health, Sports & Welfare/Cluster Oral Hygiene, Inholland University of Applied Sciences, Amsterdam, The Netherlands.
Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
Jönköping University, School of Health and Welfare, HHJ, Dep. of Nursing Science. Social Determinants of Health Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.
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2017 (English)In: Psychology and Health, ISSN 0887-0446, E-ISSN 1476-8321, Vol. 32, no 12, p. 1449-1468Article in journal (Refereed) Published
Abstract [en]

OBJECTIVE: To evaluate an intervention programme based on the Health Action Process Approach and designed to increase the intake of fruit and vegetables (F&V) among Iranian adolescents aged 13 to 18.

DESIGN: A randomised controlled trial with three arms examined the short- (1 month) and long-term (6 months) effects of the intervention. There were two intervention groups (one included adolescents only [A group; n = 510]; the second included mothers and adolescents [M + A group; n = 462]) and a control group (n = 483). All participants were recruited from schools.

MAIN OUTCOME MEASURES: Social cognitions, self-regulatory processes and F&V intake.

RESULTS: The intervention led to an increase in F&V intake for adolescents in the short and long terms. Adolescents in the M + A group increased their F& V intake more than adolescents in the A group. Outcome expectancies, self-monitoring, intentions, action and coping planning, perceived social support and behavioural automaticity mediated the effect of the intervention on F&V intake.

CONCLUSION: The theory-based intervention led to an increase in F&V intake and promoted more positive social cognitions and self-regulatory processes among Iranian adolescents. The findings also provide evidence that involving mothers in an intervention can confer additional benefit.

Place, publisher, year, edition, pages
Taylor & Francis, 2017. Vol. 32, no 12, p. 1449-1468
Keywords [en]
adolescent; behaviour; fruit and vegetable; intervention; randomised-controlled trial
National Category
Psychology Public Health, Global Health, Social Medicine and Epidemiology
Identifiers
URN: urn:nbn:se:hj:diva-37198DOI: 10.1080/08870446.2017.1341516ISI: 000416697500002PubMedID: 28681612Scopus ID: 2-s2.0-85021926022Local ID: HHJövrigtISOAI: oai:DiVA.org:hj-37198DiVA, id: diva2:1139122
Available from: 2017-09-06 Created: 2017-09-06 Last updated: 2017-12-28Bibliographically approved

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