Promoting Fruit and Vegetable Intake in Parents: A Cluster Randomised Controlled Trial

Yuying Sun, Samantha S. W. Fung, Patrick K. W. Man, Alice N. T. Wan, Sunita Stewart, Tai Hing Lam and Sai Yin Ho
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Yuying Sun: School of Public Health, The University of Hong Kong, Hong Kong, China
Samantha S. W. Fung: School of Public Health, The University of Hong Kong, Hong Kong, China
Patrick K. W. Man: Tung Wah Group of Hospitals, Hong Kong, China
Alice N. T. Wan: School of Public Health, The University of Hong Kong, Hong Kong, China
Sunita Stewart: Department of Psychiatry, The University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
Tai Hing Lam: School of Public Health, The University of Hong Kong, Hong Kong, China
Sai Yin Ho: School of Public Health, The University of Hong Kong, Hong Kong, China

IJERPH, 2021, vol. 18, issue 10, 1-12

Abstract: We conducted a cluster randomised controlled trial of parents in 56 primary schools and community service centres (clusters) to evaluate the effectiveness of a single-session workshop on promoting more fruit and vegetable (FV) intake. A total of 803 parents were randomised to the FV intervention arm (16 clusters, n = 197), the more appreciation control arm (19 clusters, n = 270), or the less criticism control arm (21 clusters, n = 336). The FV intake of the FV arm was compared with that of the combined more appreciation or less criticism (MALC) arm. Both arms received a 2 h workshop: (i) the FV arm on increasing FV consumption and related food literacy; (ii) the MALC arm on increasing appreciation or reducing criticism of children. Primary outcomes were FV consumption per day in the past week assessed at baseline, 2-weeks, and 6-weeks. Secondary outcomes were behavioural determinants proposed by the Health Action Process Approach (HAPA), including outcome expectancies, self-efficacy, intention, and planning behaviour. The FV arm had a greater increase in FV consumption than the MALC arm, with large effect sizes ( d : 0.97–1.08) and improvements in behavioural determinants with small effect sizes at all time points ( d : 0.19–0.43). Our study was the first population-based randomised controlled trial to show that a brief, single 2 h HAPA-based workshop was effective in promoting fruit and vegetable intake in parents.

Keywords: primary prevention; randomised controlled trial; behaviour change; dietary intakes; fruit and vegetable (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
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