Dietary Intervention Study on Food Based Dietary Guidelines for Sustainable and Healthy Lifestyles
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 355
- 试验地点
- 3
- 主要终点
- Diet-related greenhouse gas emissions reported as kilograms of carbon dioxide equivalents per day
研究概览
简要总结
The aim of the study is to provide proof of the effectiveness, acceptability, healthfulness and nutritional adequacy of dietary guidelines to reduce greenhouse gas emissions. The study will compare the effect of dietary advice based on 1) healthy climate-friendly dietary guidelines (intervention group) or 2) standard healthy dietary guidelines (control) on greenhouse gas emissions associated with dietary intake over 12 weeks.
详细描述
A randomised, parallel controlled trial will recruit n=360 healthy adults (age 18-64) across three research centres. After successful screening and receiving informed consent, participants will be randomised into the intervention or the control group for the duration of the 12-week trial described in detail in the text and figure below. The intervention group will receive dietary advice based on climate friendly eating recommendations. The control group will receive dietary recommendations based on Healthy Ireland's Healthy Eating Guidelines and Food Pyramid (FSAI, 2019).
Prior to their first onsite visit, participants will be asked to complete a Health and Lifestyle questionnaire and dietary assessment. The dietary assessment will include
- 3 online 24-hour recalls (2 non-consecutive weekdays and 1 weekend day) (via web-based dietary recall tool, Foodbook24)
- a food frequency questionnaire (Foodbook24)
Baseline, Visit 1 (Week 0): We will collect blood and urine samples from participants and record anthropometric measurements. Participants will be asked to complete a Stage of Change questionnaire to assess their openness to a diet change. All participants will complete a Food Waste Questionnaire at baseline for later comparison at endpoint. At the end of Visit 1 participants will receive a personalised feedback report and advice from nutritionists based on their habitual diet.
Week 6: Participants will be asked to complete a second dietary assessment during week 6. 3 24-hour recalls and a food frequency questionnaire will be hosted on Foodbook24, a web-based dietary recall tool.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Other
- 盲法
- Single (Participant)
盲法说明
Single-blinded parallel study
入排标准
- 年龄范围
- 18 Years 至 64 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Provide written informed consent
- •Be a healthy adult between the ages of 18-64 years old
- •Consume a diet associated with moderate-high greenhouse gas emissions
- •Be in good general health
排除标准
- •Are pregnant, lactating or planning to become pregnant
- •Are following a medically prescribed diet
- •Have a diagnosis of an acute or chronic medical condition that could interfere with the outcomes of the study. Such diagnoses include (but are not limited to) cardiovascular disease, diabetes mellitus, inflammatory bowel disease, cancers (within the last 5 years), etc.
- •Are immunocompromised or have a suspected immunodeficiency
- •Have excessive alcohol intake (>28 units per week)
- •Have a known food allergy
- •Regularly consume a single high-dose vitamin or mineral supplement
- •Are participating in another research study
- •Are unable to read, write or understand English.
研究组 & 干预措施
Healthy climate-friendly dietary guidelines
Personalised healthy dietary recommendations aimed at reducing diet-related greenhouse gas emissions
干预措施: Healthy climate-friendly dietary guidelines (Behavioral)
Healthy eating guidelines
Personalised healthy dietary recommendations based on Ireland's Healthy Eating Guidelines
干预措施: Healthy dietary guidelines (Behavioral)
结局指标
主要结局
Diet-related greenhouse gas emissions reported as kilograms of carbon dioxide equivalents per day
时间窗: 12 weeks
Participants will record their diet at baseline (habitual diet) and endpoint (intervention diet) using an online 24-hour recall method. Diet-related greenhouse gas emissions will be estimated using food, nutrient and food-related greenhouse gas emissions databases (measured as kilograms of carbon dioxide equivalents). The primary outcome measure is the change in diet-related greenhouse gas emissions (kgCO2-eq/day) as a result of the intervention diet.
次要结局
- Urinary iodine (micrograms per liter)(12 weeks)
- Fasting glucose (milimoles per liter)(12 weeks)
- Calcium intake (milligrams per day)(12 weeks)
- Serum lipids (milimoles per liter)(12 weeks)
- Iron intake (milligrams per day)(12 weeks)
- Serum vitamin D status (25(OH)D nanomole per liter)(12 weeks)
研究者
Aifric O'Sullivan
Lecturer/Assistant Professor
University College Dublin