Farming for Life - Health Impact of Organic Vegetable Prescriptions for Adults Living With or at Risk of Type 2 Diabetes (FFL)
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|ClinicalTrials.gov Identifier: NCT03940300|
Recruitment Status : Recruiting
First Posted : May 7, 2019
Last Update Posted : June 16, 2021
|First Submitted Date ICMJE||May 2, 2019|
|First Posted Date ICMJE||May 7, 2019|
|Last Update Posted Date||June 16, 2021|
|Actual Study Start Date ICMJE||January 28, 2019|
|Estimated Primary Completion Date||December 2023 (Final data collection date for primary outcome measure)|
|Current Primary Outcome Measures ICMJE
|Original Primary Outcome Measures ICMJE||Same as current|
|Current Secondary Outcome Measures ICMJE
|Original Secondary Outcome Measures ICMJE
|Current Other Pre-specified Outcome Measures
|Original Other Pre-specified Outcome Measures
|Brief Title ICMJE||Farming for Life - Health Impact of Organic Vegetable Prescriptions for Adults Living With or at Risk of Type 2 Diabetes|
|Official Title ICMJE||Farming for Life - a Program to Prescribe Fresh Organic Vegetables for Adults Living With or at Risk of Type 2 Diabetes.|
Farming for Life aims to determine the health impacts of providing weekly "prescriptions" of fresh organic vegetables to adults living with or at risk of type 2 diabetes. Over 4 years, up to 400 adults diagnosed with or at high risk of developing type 2 diabetes will be engaged for 3 months each, and receive weekly doses of locally-grown organic vegetable prescriptions. The end-points for comparison will be changes in blood pressure, weight, waist circumference, glycemic control [defined as Time in Range (TIR) (70-140mg/dl)] using continuous glucose monitoring (CGM), and HbA1c levels (a measure of long-term blood glucose level control) after 3 months compared to baseline measurements. Additional assessments will be made on the impact of the organic vegetable prescriptions on food security. At an optional Visit 13, offered 6 months after Visit 1, an additional health screening will be conducted.
Prevalence and risk of type 2 diabetes in the US is disproportionately high among low income and minority groups and is exasperated by high levels of food insecurity. The investigators hypothesize that improving access to fresh organic vegetables will result in measurable health outcomes for adults with type 2 diabetes and those at risk of developing the condition. This represents a promising and potentially cost-effective strategy for improving diabetes outcomes at a population level, particularly among low income, minority populations with type 2 diabetes.
Farming for Life will recruit adults with or at high risk of developing type 2 diabetes (non-insulin treated). Because diabetes rates are disproportionately high in low income and minority populations, the investigators expect that many participants will be members of these groups. After obtaining written consent, participants will receive 10 weekly free "prescriptions" of fresh organic vegetables sourced from local growers. Health measurements will be conducted by trained clinical staff at baseline and upon completion of the intervention period.
The total duration for the program is approximately 4 years, in which up to 400 participants may be engaged. Program visits will take place at vegetable distribution centers and clinical locations (SDRI or other clinical sites). SDRI will ensure provision of appropriately trained clinical staff and equipment to obtain accurate clinical measurements.
Potential participants will be recruited via bilingual outreach materials. Up to 440 individuals will be enrolled for an anticipated 400 individuals completing the program (8% anticipated dropout rate). A subset of approximately 120 participants will use CGM.
Eligible and consented participants in this program will be asked to complete 12 visits, with an optional 13th visit. Over the course of these visits, participants will collect 10 weekly organic vegetable prescriptions that are signed by a qualified medical practitioner, as well as complete health screenings and questionnaires during the first and last visits. For those using CGM, data will be collected by study staff at an additional Visit 3b, concluding the first 14 days of participation, and at Visit 12, concluding the final 14 days of participation. At each prescription pick-up visit, each participant will receive a week's "dose" of organic vegetables. The outcome data will be collected at Visit 1 after obtaining informed consent and at Visit 12 after the completion of 10 weeks of prescriptions. Additionally, participants will be invited to submit via cell phone, photographs of meals featuring their prescribed organic vegetables. At an optional Visit 13, offered 6 months after Visit 1, an additional health screening will be conducted.
Participants may receive nutrition education in the form of printed material featuring organic vegetable recipes and nutrition guidance offered at vegetable collection sites. Recipes will be sourced from the American Diabetes Association Diabetes Food Hub website (www.diabetesfoodhub.org). Aside from the weekly supply of organic vegetables allocated by prescription, health measurements, and printed nutrition education materials, there will be no compensation nor other incentives for program participants.
The Unity Shoppe in Santa Barbara (http://www.unityshoppe.org/) hosted Farming for Life in a pilot and will be a storage and distribution site. If necessary, additional appropriately-equipped, Independent Review Board (IRB) approved sites may be used. Visits 1, 12, and 13 will occur at SDRI and, if necessary, additional appropriately-equipped, IRB approved clinical sites.
The organic vegetables for this program will primarily be sourced and purchased wholesale from two or more farms within 100 miles of the vegetable distribution location/s. Organic vegetables received for prescription distribution will be coded and tracked through an inventory system.
Visit 1 begins with screening and enrollment via the initiation of the informed consent process. Participant eligibility will be confirmed following review of the inclusion and exclusion criteria by program staff. Each participant will be provided with oral and written information (English and/or Spanish, as appropriate) describing the nature and duration of the program. Prior to initiation of program-related procedures, the participant will sign and date the written informed consent and authorization form, authorizing the use and disclosure of the participant's protected health information (PHI). The participant will also sign the California Experimental Subject's Bill of Rights.
Once enrolled via informed consent, participants will first complete questionnaires on diabetes management, food security and health. Then participant height, weight, blood pressure and waist circumference will be measured. HbA1c level will be measured via finger-stick. A subset of up to 120 participants will then be trained to wear CGM sensors under supervision of staff. Participants will be informed that the CGM data will be blinded during each CGM session. The CGM data for each participant who may wear a CGM sensor will be summarized using software which produces both a statistical and graphic display of data. Participants will then receive a prescription for 10 weeks of organic vegetables. Finally, participants will be invited to share photographs of and recipes for meals they prepare with their prescribed organic vegetables.
Visits 2-11 will all follow the same format and will include the fulfillment of weekly prescriptions. The types and quantities of organic vegetables distributed to each participant will be tracked. For those using CGM, during visit 3 the CGM sensor will be removed, and during visit 10 a CGM sensor will be inserted.
During Visit 12, clinical measurements will be taken and recorded as in Visit 1. For those using CGM, the CGM sensor will be removed and data will be downloaded from the recorder. After these measurements, participants will complete questionnaires on diet, food security, and health as they did in Visit 1. Participants will also complete an Exit Questionnaire to gauge satisfaction with and experience participating in the program.
At an optional Visit 13, offered 6 months after Visit 1, an additional health screening will be conducted.
|Study Type ICMJE||Interventional|
|Study Phase ICMJE||Not Applicable|
|Study Design ICMJE||Allocation: N/A
Intervention Model: Single Group Assignment
Intervention Model Description:
Eligible and consented participants in this program will be asked to complete 12 visits. Over the course of these visits, participants will collect 10 weekly organic vegetable prescriptions signed by a qualified medical practitioner, as well as complete health screenings and questionnaires during the first and last visits. At each prescription pick-up visit, each participant will receive a week's "dose" of organic vegetables. The outcome measures will be collected at Visit 1 after obtaining informed consent and at Visit 12 after the completion of 10 weeks of prescriptions. Additionally, participants will be invited to submit via cell phone photographs of meals featuring their prescribed vegetables. At an optional Visit 13, offered 6 months after Visit 1, an additional health screening will be conducted.Masking: None (Open Label)
Primary Purpose: Treatment
|Intervention ICMJE||Dietary Supplement: Fresh organic vegetables
Individual participation in this program will take 12 weeks, from screening and enrollment through evaluation. Once enrolled, visits will occur on a weekly basis to ensure that participants receive each week's "dose" of fresh organic vegetables. At an optional Visit 13, offered 6 months after Visit 1, an additional health screening will be conducted.
|Study Arms ICMJE||Experimental: Adults with or risk for Type 2 Diabetes
All adult individuals with (non-insulin treated) or at risk for type 2 diabetes are in the treatment group and will receive prescriptions of fresh organic vegetables on a weekly basis for 10 weeks.
Intervention: Dietary Supplement: Fresh organic vegetables
|Publications *||Kerr D, Barua S, Glantz N, Conneely C, Kujan M, Bevier W, Larez A, Sabharwal A. Farming for life: impact of medical prescriptions for fresh vegetables on cardiometabolic health for adults with or at risk of type 2 diabetes in a predominantly Mexican-American population. BMJ Nutr Prev Health. 2020 Oct 5;3(2):239-246. doi: 10.1136/bmjnph-2020-000133. eCollection 2020 Dec.|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Recruitment Status ICMJE||Recruiting|
|Estimated Enrollment ICMJE
|Original Estimated Enrollment ICMJE||Same as current|
|Estimated Study Completion Date ICMJE||May 2024|
|Estimated Primary Completion Date||December 2023 (Final data collection date for primary outcome measure)|
|Eligibility Criteria ICMJE||
|Ages ICMJE||18 Years and older (Adult, Older Adult)|
|Accepts Healthy Volunteers ICMJE||No|
|Listed Location Countries ICMJE||United States|
|Removed Location Countries|
|NCT Number ICMJE||NCT03940300|
|Other Study ID Numbers ICMJE||2018-01793|
|Has Data Monitoring Committee||No|
|U.S. FDA-regulated Product||
|IPD Sharing Statement ICMJE||Not Provided|
|Responsible Party||Sansum Diabetes Research Institute|
|Study Sponsor ICMJE||Sansum Diabetes Research Institute|
|Collaborators ICMJE||United States Department of Agriculture (USDA)|
|PRS Account||Sansum Diabetes Research Institute|
|Verification Date||June 2021|
ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP