Socioeconomic Position and the Effect of Portion Size Reduction: a 1-day Dietary Behaviour Experimental Study
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 54
- 试验地点
- 1
- 主要终点
- Daily energy intake
研究概览
简要总结
Reducing food portion size is a potential strategy to reduce energy intake. There is some evidence to suggest that individuals with lower socioeconomic position (SEP) intend to eat more from larger portions, suggesting that the effect of portion size on food intake might vary by SEP. However, no study has tested this by measuring actual food intake. This study examines whether reductions to the portion size of components of a main meal will reduce daily energy intake, and whether and how socioeconomic position (higher vs lower) moderates the portion size effect.
In a crossover experiment, participants will be served all meals in the lab on two separate days, with the portion size of main meal components at lunch and dinner manipulated (i.e. smaller on one day vs larger on the other day). All other foods offered are identical. Food intake from the portion-manipulated lunch and dinner, as well as all other meal components (breakfast, dessert, seconds, snacks) will be measured, and any additional food consumed by the participant will be measured using self-report, giving total daily energy intake (kcal).
详细描述
See attached protocol document.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Prevention
- 盲法
- Single (Participant)
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- Female
- 接受健康志愿者
- 是
入选标准
- •UK (United Kingdom) residents, aged 18 or over
- •Fluent in English
- •willing to consume the test foods
- •Self report liking of test foods
- •BMI between 22.5 - 32.5kg2
排除标准
- •taking medication which affects appetite
- •currently pregnant
- •history of eating disorders
- •currently on a diet to lose weight
- •food allergies, intolerances or specific dietary requirements (including being vegetarian or vegan)
- •participated in 2018 Mood Study
- •currently participating in another study where meals are provided
研究组 & 干预措施
Larger portions
the main meal component (lunch/dinner) served to participants in the laboratory, reflecting 100% portion. All other foods are identical across conditions (e.g. sides, seconds, breakfast, dessert, snacks).
干预措施: Portion size manipulation (Behavioral)
Smaller portions
the main meal component (lunch/dinner) served to participants in the laboratory, reflecting 66% portion (i.e. reduced portion size). All other foods are identical across conditions (e.g. sides, seconds, breakfast, dessert, snacks).
干预措施: Portion size manipulation (Behavioral)
结局指标
主要结局
Daily energy intake
时间窗: 24 hours after intervention administered
Total energy (kcal) consumed from breakfast, lunch, dinner, dessert, snackbox, and any self-reported additional foods.
次要结局
- Moderate-vigorous physical activity(24 hours after intervention administered)
- Appetite(24 hours after intervention administered)
研究者
Eric Robinson
Principal Investigator (Reader in Psychological Sciences)
University of Liverpool