Multi-level Supermarket Discount Study
Study Details
Study Description
Brief Summary
The study team's objective is to test the effect of supermarket discount levels on fruit and vegetable (F&V) and non-caloric beverage purchasing and consumption, as well as health outcomes. The study team will implement this economic intervention in a local supermarket chain to assess the effects of a 32-week intervention of fruit and vegetable (F&V) and non-caloric beverage discounts of 30%, 15%, and 0% (control group) on purchasing, dietary intake, and health outcomes, including body weight and composition, blood pressure, and biochemical markers of cardiovascular disease risk. The 32-week intervention will be preceded by an 8-week baseline and will have a follow-up period of 16 weeks. There will be no discounts in effect during the baseline and follow-up periods.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
|
N/A |
Detailed Description
The objective is to test the effect of supermarket discount levels on fruit and vegetable (F&V) and non-caloric beverage purchasing and consumption, as well as health outcomes. The study team will implement this economic intervention in a local supermarket chain to assess the effects of a 32-week intervention of fruit and vegetable (F&V) and non-caloric beverage discounts of 30%, 15%, and 0% (control group) on purchasing, dietary intake, and health outcomes, including body weight and composition, blood pressure, and biochemical markers of cardiovascular disease risk. The prediction is that the impact will increase with the level of discount. The 32-week intervention will be preceded by an 8-week baseline and will have a follow-up period of 16 weeks. There will be no discounts in effect during the baseline and follow-up periods. The prediction is that some of the interventional effects will carry over to the follow-up period.
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| Experimental: Experimental 15% discount intervention 15% discount on fruits, vegetables and non-caloric beverages at the designated supermarkets |
Behavioral: Discount Intervention
15% or 30% discount on fruits and vegetables
|
| Experimental: Experimental 30% discount intervention 30% discount on fruits, vegetables and non-caloric beverages at the designated supermarkets |
Behavioral: Discount Intervention
15% or 30% discount on fruits and vegetables
|
| No Intervention: No intervention control group 0% discount on fruits, vegetables and non-caloric beverages at the designated supermarkets |
Outcome Measures
Primary Outcome Measures
- Individual consumption behaviors [Week 0]
Fruit and vegetable intake as assessed by 24-h dietary recalls
- Individual consumption behaviors [Week 8]
Fruit and vegetable intake as assessed by 24-h dietary recalls
- Individual consumption behaviors [Week 24]
Fruit and vegetable intake as assessed by 24-h dietary recalls
- Individual consumption behaviors [Week 40]
Fruit and vegetable intake as assessed by 24-h dietary recalls
- Individual consumption behaviors [Week 56]
Fruit and vegetable intake as assessed by 24-h dietary recalls
Secondary Outcome Measures
- Body Weight [Week 0]
Body weight (kg)
- Body Weight [Week 8]
Body weight (kg)
- Body Weight [Week 24]
Body weight (kg)
- Body Weight [Week 40]
Body weight (kg)
- Body Weight [Week 56]
Body weight (kg)
- Body Mass Index (BMI) [Week 0]
BMI (kg/m2)
- Body Mass Index (BMI) [Week 8]
BMI (kg/m2)
- Body Mass Index (BMI) [Week 24]
BMI (kg/m2)
- Body Mass Index (BMI) [Week 40]
BMI (kg/m2)
- Body Mass Index (BMI) [Week 56]
BMI (kg/m2)
- Percent Body Fat [Week 56]
% body fat
- Percent Body Fat [Week 0]
% body fat
- Percent Body Fat [Week 8]
% body fat
- Percent Body Fat [Week 24]
% body fat
- Percent Body Fat [Week 40]
% body fat
- Waist Circumference [Week 0]
Waist circumference (cm) Metabolic risk factors (fasting glucose, cholesterol, blood pressure) and metabolic syndrome
- Waist Circumference [Week 8]
Waist circumference (cm) Metabolic risk factors (fasting glucose, cholesterol, blood pressure) and metabolic syndrome
- Waist Circumference [Week 24]
Waist circumference (cm) Metabolic risk factors (fasting glucose, cholesterol, blood pressure) and metabolic syndrome
- Waist Circumference [Week 40]
Waist circumference (cm) Metabolic risk factors (fasting glucose, cholesterol, blood pressure) and metabolic syndrome
- Waist Circumference [Week 56]
Waist circumference (cm) Metabolic risk factors (fasting glucose, cholesterol, blood pressure) and metabolic syndrome
- Fasting glucose [Week 0]
Fasting glucose level
- Fasting glucose [Week 8]
Fasting glucose level
- Fasting glucose [Week 24]
Fasting glucose level
- Fasting glucose [Week 40]
Fasting glucose level
- Fasting glucose [Week 56]
Fasting glucose level
- Cholesterol Level [Week 0]
Cholesterol level
- Cholesterol Level [Week 8]
Cholesterol level
- Cholesterol Level [Week 24]
Cholesterol level
- Cholesterol Level [Week 40]
Cholesterol level
- Cholesterol Level [Week 56]
Cholesterol level
- Blood Pressure [Week 0]
Blood pressure (diastolic/systolic)
- Blood Pressure [Week 8]
Blood pressure (diastolic/systolic)
- Blood Pressure [Week 24]
Blood pressure (diastolic/systolic)
- Blood Pressure [Week 40]
Blood pressure (diastolic/systolic)
- Blood Pressure [Week 56]
Blood pressure (diastolic/systolic)
- Gross weekly purchasing of fruits and vegetables [Week 8-56]
Gross weekly purchasing of fruits and vegetables from the discounted items list in dollars
Eligibility Criteria
Criteria
Inclusion Criteria:
-
BMI: 24.5 - 50
-
Weight Stable (±5% body weight in last 3 mo)
-
Accessible by telephone
-
Living in NYC and not planning move
-
Primary household food shopper
-
≥50% of food shopping at Foodtown/Brooklyn Harvest and agrees to 100% shopping at store during study
-
Consumption of >50% of food shopping
-
Eat out or take out ≤5 times weekly
Exclusion Criteria:
-
Pregnant or contemplating pregnancy
-
Enrolled in related studies
-
Active weight loss program
-
Presence of serious medical (e.g. cancer, diabetes) or psychiatric disease (e.g. bipolar)
-
Changes in medications or smoking in past 3 mo
-
Excessive alcohol use (≥4 drinks/day) or illicit drug use
-
Planning a vacation ≥ 4 consecutive weeks or 6 total weeks during study
-
Receiving SNAP benefits
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | Mount Sinai St. Luke's | New York | New York | United States | 10025 |
Sponsors and Collaborators
- Icahn School of Medicine at Mount Sinai
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Investigators
- Principal Investigator: Allan Geliebter, PhD, Icahn School of Medicine at Mount Sinai
Study Documents (Full-Text)
None provided.More Information
Publications
- Bernales-Korins M, Ang IYH, Khan S, Geliebter A. Psychosocial Influences on Fruit and Vegetable Intake Following a NYC Supermarket Discount. Obesity (Silver Spring). 2017 Aug;25(8):1321-1328. doi: 10.1002/oby.21876. Epub 2017 Jun 7.
- Geliebter A, Ang IYH, Bernales-Korins M, Hernandez D, Ochner CN, Ungredda T, Miller R, Kolbe L. Supermarket discounts of low-energy density foods: effects on purchasing, food intake, and body weight. Obesity (Silver Spring). 2013 Dec;21(12):E542-8. doi: 10.1002/oby.20484. Epub 2013 Jul 5.
- GCO 16-1050
- R01DK105440