Does the cost of a meal influence the portion size effect?
Does the cost of a meal influence the portion size effect?
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DOI：
10.1016/j.appet.2018.05.020
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发表时间：
2018-08
期刊：
影响因子：
5.4
通讯作者：
Faris M. Zuraikat;L. Roe;Alissa D Smethers;Levi W. Reihart;B. Rolls
中科院分区：
文献类型：
--
作者：
Faris M. Zuraikat;L. Roe;Alissa D Smethers;Levi W. Reihart;B. Rolls
提供更大份量的食物会导致摄入量增加，但人们对一顿饭的费用如何影响这种反应知之甚少。因此，我们测试了一顿饭的支付金额是否影响了在受控餐厅风格的环境中提供的午餐的份量效应。在交叉设计中，79名成年人(55名女性，24名男性)在四周的时间里每周来实验室一次，吃主菜意大利面和配菜。在几周的时间里，这顿饭有两个因素：主菜的份量(400 g或600 g)和一餐的费用(8美元或16美元)。在出院时，受试者完成了评估被认为影响对食物大小和成本反应的行为的问卷。结果表明，主菜的份量大小对摄食量有显著影响(P <； 0.0001)。每餐进食重量增加18 ± 2%(平均 ± SEM83 ± 11 g)，能量摄入量增加20 ± 2%(133 ± 16 kcal)。这些分量大小的影响在两个成本水平上没有不同(交互作用P >； 均为0.37)，膳食成本对膳食摄入量也没有显著影响(P >； 均为0.24)。然而，受试者的饱腹感反应分数确实影响了食物摄入量的大小(P = 0.0007)。在饱腹感反应分数较低的受试者中，提供更大份量的食物会导致摄入量增加(P <； 0.0001)，但在得分较高的受试者中，这并不影响摄入量。总而言之，在餐馆式的环境中，食物大小对摄入量的影响不受膳食成本的影响，但在对饱腹感反应较高的个体中，这种影响会减弱。
Serving larger portions leads to increased intake, but little is known about how the cost of a meal affects this response. Therefore, we tested whether the amount of money paid for a meal influenced the portion size effect at a lunch served in a controlled restaurant-style setting. In a crossover design, 79 adults (55 women; 24 men) came to the lab once a week for 4 weeks to eat a main dish of pasta with side dishes. Across weeks, the meal was varied in two factors: portion size of the main dish (400 g or 600 g) and cost of the meal (US$8 or $16). At discharge subjects completed questionnaires that assessed behaviors thought to influence the response to portion size and cost. Results showed that the portion size of the main dish had a significant effect on meal intake (P < 0.0001). The weight of food consumed at the meal increased by 18 ± 2% (mean ± SEM 83 ± 11 g) and energy intake increased by 20 ± 2% (133 ± 16 kcal) when the larger portion was served. These effects of portion size did not differ across the two levels of cost (both interactions P > 0.37) nor did meal cost have significant effects on meal intake (both P > 0.24). Subject scores for satiety responsiveness did, however, influence the effect of portion size on food intake (P = 0.0007). Serving larger portions led to increased intake in subjects with lower satiety responsiveness scores (P < 0.0001), but did not affect intake in those with higher scores. In summary, the effect of portion size on intake in a restaurant-style setting was not influenced by meal cost but was attenuated in individuals higher in satiety responsiveness.