Portion Size Effects on Body Weight: Free Living Setting
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 233
- 试验地点
- 2
- 主要终点
- body weight change
研究概览
简要总结
The study purpose was to evaluate the effects of portion sizes on body weight and energy intake in a free-living setting. 223 healthy adults were recruited from an urban worksite and randomized to one of four groups for a six-month period. The groups were: 1) 400 kcal box lunch; 2) 800 kcal box lunch; 3) 1600 kcal box lunch; or 4) no box lunch. Participants were required to pick up a box lunch every week day for six months. Control participants did not receive a box lunch and were instructed to eat their usual lunch. Participants were weighed and dietary intake measured at baseline, one, three and six months. It was hypothesized that at six months, participants in the 1600 kcal box lunch would gain more weight and have higher energy intake than those in the other groups.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Prevention
- 盲法
- Double (Participant, Outcomes Assessor)
入排标准
- 年龄范围
- 18 Years 至 60 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •: 1) age 18-60 yrs; 2) nonsmoker; 3) fluent in English; 4) not taking medications that affect appetite or body weight; 5) work at the medical complex full time, including during the lunch hours; 6) not allergic to the foods in the study lunches; 7) willing to eat the foods in the study lunches [examples were provided of the types of foods]; 8) not currently on a diet to lose weight; 9) no history of a diagnosed eating disorder; 10) not moving from the area during the next six months; 11) not currently taking part in another research study; 12) not currently pregnant, nursing or pregnant in the last 12 months.
排除标准
- •if the person does not meet the criteria above
结局指标
主要结局
body weight change
时间窗: six months
change in body weight from baseline to six months
次要结局
- dietary energy intake(six months)