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Increasing Engagement With a Healthy Food Benefit

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
 
ClinicalTrials.gov Identifier: NCT02486588
Recruitment Status : Completed
First Posted : July 1, 2015
Results First Posted : July 10, 2020
Last Update Posted : July 10, 2020
Sponsor:
Information provided by (Responsible Party):
University of Pennsylvania

Brief Summary:
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.

Condition or disease Intervention/treatment Phase
Purchasing Behaviors Nutrition Other: Messaging Other: Financial incentives Not Applicable

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 7314 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Health Services Research
Official Title: Increasing Engagement With the Vitality HealthyFood Benefit: A Randomized Field Trial Proposal
Study Start Date : October 2015
Actual Primary Completion Date : December 2016
Actual Study Completion Date : April 30, 2017

Arm Intervention/treatment
No Intervention: Control--no weekly message
10% cash back level, no weekly message, and the standard monthly message
Experimental: General Weekly Message
10% cash back, general weekly message, standard monthly message
Other: Messaging
See detailed study description for overview of the different messaging interventions in this study

Other: Financial incentives
See detailed study description for overview of the different financial incentive-based interventions in this study

Experimental: Personalized Weekly Message
10 % cash back, personalized weekly message, standard monthly message
Other: Messaging
See detailed study description for overview of the different messaging interventions in this study

Other: Financial incentives
See detailed study description for overview of the different financial incentive-based interventions in this study

Experimental: 25 percent cash back
25% cash back, personal weekly message, standard monthly message
Other: Messaging
See detailed study description for overview of the different messaging interventions in this study

Other: Financial incentives
See detailed study description for overview of the different financial incentive-based interventions in this study

Experimental: Standard monthly message
10%+15% cash back, personal weekly message, standard monthly message
Other: Messaging
See detailed study description for overview of the different messaging interventions in this study

Other: Financial incentives
See detailed study description for overview of the different financial incentive-based interventions in this study

Experimental: Unbundled monthly message
10%+15% cash back, personal weekly message, unbundled monthly message
Other: Messaging
See detailed study description for overview of the different messaging interventions in this study

Other: Financial incentives
See detailed study description for overview of the different financial incentive-based interventions in this study




Primary Outcome Measures :
  1. Monthly % Healthy Food Expenditure [ Time Frame: 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.



Secondary Outcome Measures :
  1. Monthly % Unhealthy Food Expenditure [ Time Frame: Monthly over 6 month intervention period ]

    The difference in monthly unhealthy food expenditures between arms. This measure is defined as the monthly amount spent on unhealthy foods divided by the total monthly amount spent on food, multiplied by 100.

    The average over the full intervention months will be calculated within an individual and compared between arms. To be complementary with the primary endpoint analysis, in a month where an individual is not engaged in the program (0 total monthly expenditure) the worst-score (100) is imputed for that month. A similar MI approach will also be conducted as a sensitivity analysis.


  2. Monthly % Healthy Items [ Time Frame: Monthly over 6 month intervention period ]

    The difference in monthly healthy food items purchased between arms. This measure is defined as the monthly number of healthy food items divided by the total monthly number of food items.

    The average over the full intervention months will be calculated within an individual and compared between arms. To be complementary with the primary endpoint analysis, in a month where an individual is not engaged in the program (0 total monthly expenditure) the worst-score (0) is imputed for that month. A similar MI approach will also be conducted as a sensitivity analysis.


  3. Monthly % Unhealthy Items [ Time Frame: Monthly over 6 month intervention period ]

    The difference in monthly unhealthy food items purchased between arms. This measure is defined as the monthly number of unhealthy food items divided by the total monthly number of food items.

    The average over the full intervention months will be calculated within an individual and compared between arms. To be complementary with the primary endpoint analysis, in a month where an individual is not engaged in the program (0 total monthly expenditure) the worst-score (100) is imputed for that month. A similar MI approach will also be conducted as a sensitivity analysis.


  4. Percentage Change in Monthly % Healthy Food Expenditures Between Arms [ Time Frame: During the 6 month intervention period ]
    Examining the difference in healthy food expenditure trends between arms where the % health food expenditure is defined as describe for outcome 1 (above)

  5. Percent Change in Monthly %Unhealthy Food Expenditures Between Arms [ Time Frame: During the 6 month intervention period ]
    Examining the difference in unhealthy food expenditure trends between arms where %unhealthy food expenditure is defined as described for Outcome 2 (above).

  6. Percent Change for Monthly % Healthy Food Items Between Arms [ Time Frame: During the 6 month intervention period ]
    Examining the difference in proportion healthy food item trends between arms where % healthy food items is defined as described for Outcome 3 (above)

  7. Percent Change in Monthly %Unhealthy Food Items Between Arms [ Time Frame: During the 6 month intervention period ]
    Examining the difference in proportion unhealthy food item trends between arms where % unhealthy food items is defined as described for Outcome 5 (above).



Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • For this study, we will focus on the following individuals:

    1. 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.
    2. Members who have chosen Woolworths as their preferred HealthyFood partner.
    3. Members with an available email address and SMS-capable telephone
    4. Members with meeting specified spending cutoff (R1000 total spend in the previous month, at least 90% of which was spent at Woolworth's.)

Exclusion Criteria:

  • Anyone who does not meet all of the above inclusion criteria

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02486588


Sponsors and Collaborators
University of Pennsylvania
Investigators
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Principal Investigator: Alison Buttenheim, Phd University of Pennsylvania
Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
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Responsible Party: University of Pennsylvania
ClinicalTrials.gov Identifier: NCT02486588    
Other Study ID Numbers: 822607
First Posted: July 1, 2015    Key Record Dates
Results First Posted: July 10, 2020
Last Update Posted: July 10, 2020
Last Verified: July 2020
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No
Keywords provided by University of Pennsylvania:
Financial incentives
Messaging