Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/74405
Title: A cluster randomised controlled trial of an intervention based on the Health Action Process Approach for increasing fruit and vegetable consumption in Iranian adolescents
Authors: Lin, CY 
Scheerman, JFM
Yaseri, M
Pakpour, AH
Webb, TL
Keywords: Adolescent
Behaviour
Fruit and vegetable
Intervention
Randomised-controlled trial
Issue Date: 2017
Publisher: Routledge, Taylor & Francis Group
Source: Psychology and health, 2017, v. 32, no. 12, p. 1449-1468 How to cite?
Journal: Psychology and health 
Abstract: 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 groupMergeCell n = 510]MergeCell the second included mothers and adolescents [M + A groupMergeCell 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.
URI: http://hdl.handle.net/10397/74405
ISSN: 0887-0446
DOI: 10.1080/08870446.2017.1341516
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