Journal Articles

Permanent URI for this collectionhttps://mro.massey.ac.nz/handle/10179/7915

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    Reliability of a Modified 24 h Dietary Recall and Veggie Meter to Assess Fruit and Vegetable Intake in New Zealand Children
    (MDPI (Basel, Switzerland), 2025-10-20) Patel VV; Perera TSH; Rush E; McArley S; Wham C; Rowlands DS; Witkowska AM
    Adequate intake of fruits and vegetables (F + V) supports healthy growth and development in children, yet many New Zealand children do not meet national dietary recommendations, and methods to evaluate intake require good reliability. Objectives: To establish the validity and reliability of a modified 24 h multiple pass recall (MPR) for evaluating F + V and carotenoid intakes in children aged 9–13 years. The reliability of the Veggie Meter® (VM®), a non-invasive reflection spectrometer to estimate skin carotenoid scores and derive blood carotenoid concentrations, was also examined. Methods: Thirty-two children (20 boys, 12 girls) completed three 24 h MPRs and parent-assisted weighed food diaries (WFDs) on randomised weekdays and weekends. Skin carotenoid scores were assessed using the VM®. The validity of the MPR was evaluated against WFDs using log-transformed Pearson correlations and mean x-axis bias. The reliability was assessed by the coefficient of variation (CV) and Pearson correlations. Results: Participants did not meet recommended F + V intakes (5–5.5 servings/day): MPR (mean fruit 1.3 servings/day; vegetables 2.0), WFD (fruit 1.3; vegetables 1.9). The MPR was a valid tool to estimate fruit and vegetable daily servings (combined-day Pearson coefficients > 0.71) with only trivial–small standardized mean bias-offset vs. WFD; however, the reliability was poor for the MPR-estimated carotenoid intake (CV 126%) and F + V intake. In contrast, the VM® was reliable (Pearson correlation 0.97–0.99) with low measurement error (CV 4.0–5.2%). Conclusions: The modified 24 h MPR was valid but unreliable for estimating F + V and carotenoid intake. The VM® demonstrated high reliability as a biomarker of skin carotenoid status in children.
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    Stages of change for fruit and vegetable intake among New Zealand men: Readiness to eat five servings a day and impact of contextual factors
    (Men's Studies Press, LLC, 2010) Jury A; Flett R
    Successful behavior change according to the transtheoretical model involves progressing through a series of stages of change. This paper examines the proportion of men in each stage of change for fruit and vegetable intake, compares stage classification with intentions and behavior, and the impact of contextual factors on stage membership. Men randomly selected from the New Zealand electoral roll completed a postal questionnaire (n = 518; 45% response rate). One-third (32%) of respondents were not intending to eat five or more servings of fruit and vegetables a day (precontemplation stage), 10% were contemplating change (contemplation stage), 7% preparing to change (preparation stage), and 51% were already doing so in the combined action/maintenance stage. Intentions increased on average across stages, and fruit and vegetable intake was at least two servings higher in action/maintenance. Dietary guideline knowledge, older age, higher income, education and food security increased the likelihood of being in action/maintenance. Simple health promotion messages should be directed toward men, promoting conventional and affordable produce, and dietary guidelines. Community and policy approaches that increase food skills and knowledge, fruit and vegetable access and affordability would support behavior change.