Impact Evaluation of the Global Alliance for Improved Nutrition (GAIN) Vegetables for All Program in Kenya
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 4,213
- 试验地点
- 1
- 主要终点
- Grams of Vegetables Consumed
研究概览
简要总结
Global Alliance for Improved Nutrition (GAIN)'s "Vegetables for All" program in Kenya seeks to improve consumption of healthy foods by improving supply, increasing demand, and improving the enabling environment for different vegetables by operating at multiple levels - individuals, households, markets, producers, and policies. RTI and local partners propose to conduct impact and process evaluations of GAIN's program tailored to the theory of change. The evaluation will include a mix of quantitative and qualitative methods and will be guided by the RE-AIM (reach, effectiveness, adoption, implementation, and maintenance) evaluation framework.
详细描述
Background: In urban and peri-urban areas in Kenya, Consumption of vegetables is low in bottom of pyramid (BoP) households, which earn < 3.20 US dollars per person per day. To increase vegetable consumption in this population, GAIN will implement the Vegetables for All program, which aims to improve access to safe and fresh vegetables in Fit Food Zones (FFZs) and to generate demand for vegetables through a radio/television campaign and FFZ branding. The main retailers in the FFZ are mama mbogas (vegetable vendors), who will be linked to suppliers that are Good Agricultural Practices (GAP) compliant.
Objective
The overall objectives of the evaluation are: 1) to assess the effectiveness of GAIN's Vegetables for All program for increasing the quantity of vegetables consumed and improving the diet quality of BoP consumers and 2) to conduct a process evaluation of GAIN's program that provides data to support findings of the impact evaluation.
Methods: This study will use a mixed-methods quasi-experimental design in which 124 FFZs are assigned to intervention or control in Nairobi, Kiambu, Machakos, Mombasa, and Nakuru counties. The impacts will be assessed through cross-sectional population-based surveys of households with women 18-49 years who have a child 3-11 years in 62 intervention and 62 control FFZs at baseline and endline (N=1,364 at each time point). Mama mboga surveys will be conducted in all 124 sampled FFZs at baseline, midline, and endline (N=372 at each time point). Qualitative data will be collected at midline and endline. Focus group discussions (FGDs) will be conducted with mama mbogas (20 FGDs) and household members (20 FGDs) at midline and in-depth interviews will be conducted with market facilitators (N=20), mama mbogas (N=25), and household members (N=25) at endline. The analysis will be performed using difference-in-difference estimation (surveys) and thematic content analysis methods (qualitative).
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Parallel
- 主要目的
- Other
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Reside in the FFZs assigned;
- •Be a woman between 18-49 years old;
- •Have a child 3-12 years old
- •The household earns <$3.20 per person per day;
- •Be able to speak one of the main local languages and/or Kiswahili;
- •Provide informed consent to participate in the study.
- •Mama Mboga Surveys
- •Inclusion Criteria:
- •Be a mama mboga retailer of vegetables in a FFZ in the districts selected for the evaluation;
- •Be in business for at least 6 months
- •Be over 18 years old;
- •Be able to speak one of the main local languages and/or Kiswahili;
- •Provide informed consent to participate in the study.
- •In-depth interviews with value chain actors
- •Inclusion criteria:
- •Be a vegetable supplier to mama mbogas as part of the FFZ, are involved in demand generation activities, or involved in food safety compliance;
- •Be over 18 years old;
- •Be able to speak one of the main local languages and/or Kiswahili;
- •Provide informed consent to participate in the study.
- •Focus group discussion (FGD) participants will be selected from lists of participants in the FFZ and household surveys and will be consented again for the FGDs if they meet the following criteria:
- •FGDs with households
- •Inclusion criteria:
- •Be a woman living in a BoP household in a FFZ selected for the evaluation;
- •Have ever visited a mama mboga's place of business
- •Participated in the baseline survey
- •Be over 18 years old;
- •Be able to speak one of the main local languages and/or Kiswahili;
- •Provide informed consent to participate in the study.
- •FGDs with mama mbogas
- •Inclusion criteria:
- •Be a mama mboga linked to the Vegetables for All project in one of the intervention FFZs
- •Have been a mama mboga for at least 6 months
- •Be over 18 years old;
- •Be able to speak one of the main local languages and/or Kiswahili;
- •Provide informed consent to participate in the study.
排除标准
- 未提供
研究组 & 干预措施
Intervention
干预措施: Food system and demand generation (Behavioral)
Control/No Intervention
结局指标
主要结局
Grams of Vegetables Consumed
时间窗: Baseline (September 2023), endline (September 2025) (2 years)
Change in the mean grams of vegetables consumed during the last 24 hours by children 3-11 years old in BoP households in Fit Food Zones
次要结局
未报告次要终点
研究者
Valerie Flax
Senior Research Public Health Analyst
RTI International