Increasing Engagement With the Vitality HealthyFood Benefit: A Randomized Field Trial Proposal
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 7,314
- 主要终点
- Monthly % Healthy Food Expenditure
研究概览
简要总结
In collaboration with Vitality/Discovery in South Africa, an RCT amongst adult enrolled in the lowest tier of Vitality's HealthyFood benefit will be conducted. We will compare the effect of various messaging, and financial incentive strategies on healthy food purchasing behaviors in this population.
详细描述
The Vitality HealthyFood benefit is a three-tiered incentive program designed to encourage healthier food choices amongst members of Discovery Health's Vitality program. Once enrolled in the benefit, participating members can receive 10%, 15%, or 25% cash-back on the healthy foods they purchase at selected grocers. And, while overall enrolment in the program is high, there was been difficulty documenting change in purchasing behaviors; healthy foods have remained a consistent 25-30% of food spend, and unhealthy foods at around 15%. In the current study we would like to test whether differing types of messages and financial incentive structures may be more salient and motivating and have a greater impact on food-purchasing decisions. The proposed study will be a collaboration between Discovery Health/Vitality and researchers at the Perelman School of Medicine at the University of Pennsylvania. In the proposed RCT, Vitality members currently enrolled in the lowest tier (10% level) of the HealthyFood will be randomized to various messaging and financial incentive structures. We will then compare the effectiveness of these different interventions at increasing healthy food purchases among enrolled members.
This study will be a randomized field trial of the combination of several theoretically-motivated interventions: varying weekly messaging, financial incentives, and monthly messaging.
Messaging and financial incentives
Weekly Messaging strategies There are three weekly messaging strategies we want to test. The goal of the messages is to increase the salience of the HealthyFood programme for enrolled members. The three strategies were chosen to enable us to compare the impact of no weekly message vs. a general weekly message vs. a tailored weekly message. The messages will be sent via SMS to all subjects and will be delivered on the same day of the week.
No weekly message-A subset of study subjects will receive no weekly SMS message. This is consistent with the current benefit structure.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Health Services Research
- 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
- 否
入选标准
- •For this study, we will focus on the following individuals:
- •Adult members of Vitality Health who have activated their HealthyFood benefit in 2014 but have not completed the Vitality Age calculation or Vitality Healthy Check, and therefore are on a 10% cash- back reward level on healthy food purchases.
- •Members who have chosen Woolworths as their preferred HealthyFood partner.
- •Members with an available email address and SMS-capable telephone
- •Members with meeting specified spending cutoff (R1000 total spend in the previous month, at least 90% of which was spent at Woolworth's.)
排除标准
- •Anyone who does not meet all of the above inclusion criteria
结局指标
主要结局
Monthly % Healthy Food Expenditure
时间窗: Monthly over 6 month intervention period
The difference in monthly healthy food expenditures between arms. This measure is defined as the monthly amount spent on healthy foods divided by the total monthly amount spent on food, multiplied by 100. For those individuals who had no recorded expenditure in a given month, they will be assigned 0% healthy food expenditure that month; in this way, this outcome can be considered a composite score of being engaged in the healthy food program (0%=not engaged) and the level of engagement (if monthly expenditure \>0). Each individual's data will be averaged across the intervention period.
次要结局
- Monthly % Unhealthy Items(Monthly over 6 month intervention period)
- Percentage Change in Monthly % Healthy Food Expenditures Between Arms(During the 6 month intervention period)
- Percent Change in Monthly %Unhealthy Food Expenditures Between Arms(During the 6 month intervention period)
- Monthly % Unhealthy Food Expenditure(Monthly over 6 month intervention period)
- Percent Change for Monthly % Healthy Food Items Between Arms(During the 6 month intervention period)
- Percent Change in Monthly %Unhealthy Food Items Between Arms(During the 6 month intervention period)
- Monthly % Healthy Items(Monthly over 6 month intervention period)