包装单位尺寸和食物量：两者都会影响摄入量吗？

Package unit size and amount of food: do both influence intake?

作者信息

Raynor Hollie A, Wing Rena R

机构信息

Department of Nutrition, The University of Tennessee, 1215 W. Cumberland Avenue, Jessie Harris Building, Room 229, Knoxville, TN 37996, USA.

出版信息

Obesity (Silver Spring). 2007 Sep;15(9):2311-9. doi: 10.1038/oby.2007.274.

DOI:10.1038/oby.2007.274

PMID:17890500

Abstract

OBJECTIVE

Large portions increase intake and are hypothesized to contribute to the obesity epidemic. However, it is unclear if portion size affects intake through changes in the unit size of available food or the overall amount of food available for consumption. Thus, this study examined the independent effects of package unit size and amount of food on intake. It was hypothesized that both variables would influence intake.

RESEARCH METHODS AND PROCEDURES

Non-obese (BMI <30 kg/m(2)), non-smoking, unrestrained, college-aged men (n = 12) and women (n = 16) who regularly consumed (>or=3 times/wk) snack foods were randomly assigned to one of four groups crossing package unit size (small vs. large) and amount of food (small vs. large). Participants were given a box with 4 snack foods (potato chips, cheese crackers, cookies, and candy) packaged according to their assigned group to take home and eat over 3 days. Dependent variables were energy and gram intake of provided snack foods.

RESULTS

An effect of amount of food was found (p < 0.01). A 100% increase in the amount of food provided produced an 81% increase in energy consumed from the snack foods [small amount, 21,037.6 +/- 10,852 kJ (5,028 +/- 2,596 kcal) vs. large amount, 11,640.7 +/- 4,914.1 kJ (2,782 +/- 1,174 kcal)]. No effect of package unit size was found.

DISCUSSION

These results suggest that the amount of food available to eat strongly influences intake.

摘要

目的

大份食物会增加摄入量，据推测这是导致肥胖流行的原因之一。然而，尚不清楚食物分量是通过改变可获取食物的单位分量还是可食用食物的总量来影响摄入量。因此，本研究探讨了包装单位分量和食物量对摄入量的独立影响。研究假设这两个变量都会影响摄入量。

研究方法与步骤

选取体重正常（BMI<30 kg/m²）、不吸烟、饮食无节制、大学年龄段的男性（n = 12）和女性（n = 16），这些人经常（每周≥3次）食用休闲食品，将他们随机分为四组，这四组在包装单位分量（小份与大份）和食物量（小份与大份）方面相互交叉。给参与者一个装有4种休闲食品（薯片、芝士饼干、曲奇和糖果）的盒子，这些食品根据他们所属组别的分配进行包装，让他们带回家并在3天内吃完。因变量是所提供休闲食品的能量摄入量和克数摄入量。