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Body Mass Index and stimulus control: Results from a real-world study of eating behaviour
Appetite ( IF 5.4 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.appet.2020.104783
Stefania Franja 1 , Katherine G Elliston 1 , Stuart G Ferguson 1
Affiliation  

BACKGROUND Evidence suggests decisions about when, what, and how much to eat can be influenced by external (location, food outlet presence, food availability) and internal (affect) cues. Although the relationship between stimulus control and obesity is debated, it is suggested that individuals with higher BMIs are more driven by cues to eating than individuals in the healthy-weight range (HWR). This study investigates the influence of stimulus control on real-world food intake, and whether stimulus control differs by BMI. It was hypothesised that, compared to those in the HWR, eating among individuals with higher BMIs would be under greater stimulus control. METHOD 74 participants (n = 34 BMI < 24.9, n = 40 BMI > 24.9) recorded food intake for 14 days using Ecological Momentary Assessment. Participants also responded to 4-5 randomly-timed assessments per day. Known external and internal eating cues were assessed during both assessment types. Within-person logistic regression analyses were used to predict eating vs. non-eating occasions from stimulus control domains. FINDINGS Results support the hypothesis that eating was influenced by stimulus control: food availability, affect, time of day, and location significantly distinguished between eating and non-eating instances (AUC-ROC = 0.56-0.69, all p's < 0.001). The presence of food outlets was significantly better at distinguishing between eating and non-eating instances for those with higher BMIs (compared to individuals in the HWR). DISCUSSION Results support the notion of stimulus control in shaping eating decisions. Differences in levels of stimulus control between participants in the HWR compared to those with a high BMI suggest that dietary improvement interventions may be more effective when they are tailored to the individual and consider environmental influences on eating behaviour.

中文翻译:

身体质量指数和刺激控制:来自真实世界饮食行为研究的结果

背景 证​​据表明,关于何时吃、吃什么和吃多少的决定会受到外部(位置、食品出口的存在、食品供应)和内部(影响)线索的影响。尽管刺激控制与肥胖之间的关系存在争议,但有人认为,与健康体重范围 (HWR) 的个体相比,BMI 较高的个体更容易受到饮食线索的驱动。本研究调查了刺激控制对现实世界食物摄入量的影响,以及刺激控制是否因 BMI 不同而不同。据推测,与 HWR 中的那些相比,BMI 较高的个体的饮食会受到更大的刺激控制。方法 74 名参与者(n = 34 BMI < 24.9,n = 40 BMI > 24.9)使用生态瞬时评估记录了 14 天的食物摄入量。参与者每天还对 4-5 次随机时间的评估做出回应。在这两种评估类型期间,都评估了已知的外部和内部饮食线索。人内逻辑回归分析用于从刺激控制域预测进食与不进食的场合。结果支持以下假设,即进食受刺激控制的影响:食物可用性、影响、一天中的时间和位置显着区分进食和非进食实例(AUC-ROC = 0.56-0.69,所有 p's < 0.001)。对于 BMI 较高的人(与 HWR 中的个人相比),食品店的存在在区分进食和非进食情况方面明显更好。讨论 结果支持刺激控制在塑造饮食决定方面的概念。
更新日期:2020-11-01
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