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The reinforcing value of food and non-food alternative: Associations with BMI z-score and percent fat mass

机译：食品和非食品替代品的增强价值：BMI Z分数和脂肪质量百分比的关联

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摘要

There is growing evidence of an association between the relative reinforcing value of food (RRVF; how hard a child is willing to work for a food versus a non-food reinforcer) and weight across many life stages, but few studies have examined this association among preschool age children. This study investigated the association between the RRVF (measured as the food reinforcing ratio (FRR)) and body mass index (BMI) z-score and percent fat mass (%FM), in 3 year-old children. The sample was comprised of 33 children who were 3 years of age (36-47 months). Children selected their favourite food reinforcer (cookie) and non-food (audiobook) reinforcer to be used in the FRR task, which was delivered using a sequential progressive fixed ratio reward schedule. Child height, weight and percent body fat using bioelectrical impedance analysis were assessed by trained research staff. Linear regression analyses showed that FRR was significantly and positively associated with BMI z-scores. FRR was not significantly associated with %FM. Findings from this study support the RRVF as a potential risk factor in the development of childhood obesity. Longitudinal research involving larger sample sizes would strengthen future research exploring associations between RRVF and body composition in preschool age children.
机译：越来越多的证据表明，食物的相对加强价值之间的关联（RRVF;孩子愿意为食物与非食品加强队伍努力工作）和在许多生命阶段的重量，但是少数研究审查了这一协会学龄前儿童。本研究研究了rRFF（以食物增强比（FRR））和体重指数（BMI）Z评分和脂肪量（％FM），3岁儿童之间的关联。该样本由33名3岁儿童组成（36-47个月）。儿童选择他们最喜欢的食品加固件（饼干）和非食品（AudioBook）加强队员，用于使用顺序逐行固定比率奖励时间表提供的FRR任务。使用生物电阻抗分析的儿童高度，体重和体脂百分比进行了培训的研究人员评估。线性回归分析表明FRR显着且与BMI Z分数有关。 FRR与％FM没有显着相关。本研究的调查结果支持RRVF作为童年肥胖发展的潜在风险因素。纵向研究涉及更大的样本尺寸将加强未来的研究探索学龄前儿童rRVF与身体组成之间的关联。

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