Obesity
Conditions
Brief summary
The investigators plan to test the effect of price reduction of fruits and vegetables and non-caloric beverages on food purchasing, food intake, body weight, and body composition of primarily single adult shoppers. One hundred subjects will be randomized to an experimental or control group for a 4 month period. In the experimental group, there will be an automated 50% reduction in fruits vegetables and non-caloric beverages during the middle 2-month period. The investigators expect to observe significant changes in food shopping and eating behavior during this period, which should lead to body weight and fat loss. Some of these new shopping patterns should persist in the last month of the study even though prices revert.
Interventions
BEHAVIORALDiscount intervention
50% discount on selected fruits and vegetables at participating supermarket
Sponsors
Robert Wood Johnson Foundation
Columbia University
New York Obesity and Nutrition Research Center
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
Yes
Inclusion criteria
* regularly buy 50% of groceries at designated supermarket * primary food shopper for household, shopping for up to one other person, not counting children ≤ 6 years old
Exclusion criteria
* significant medical or psychiatric conditions * participation in a weight loss program or a related study
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Gross Weekly Purchasing of Fruits and Vegetables | week | Gross weekly purchasing of fruits and vegetables from the discounted items list in $ |
Countries
United States
Participant flow
Recruitment details
Participants were recruited via advertisement
Participants by arm
| Arm | Count |
|---|---|
| Discount Intervention Receives 50% discount intervention on selected fruits and vegetables at participating supermarket.
Discount intervention: 50% discount on selected fruits and vegetables at participating supermarket | 34 |
| Control Received no discount at the participating supermarket. | 28 |
| Total | 62 |
Withdrawals & dropouts
| Period | Reason | FG000 | FG001 |
|---|---|---|---|
| Overall Study | Lost to Follow-up | 15 | 21 |
Baseline characteristics
| Characteristic | Discount Intervention | Control | Total |
|---|---|---|---|
| Age, Continuous | 40 years STANDARD_DEVIATION 14 | 41 years STANDARD_DEVIATION 14 | 41 years STANDARD_DEVIATION 14 |
| Ethnicity (NIH/OMB) Hispanic or Latino | 4 Participants | 3 Participants | 7 Participants |
| Ethnicity (NIH/OMB) Not Hispanic or Latino | 30 Participants | 25 Participants | 55 Participants |
| Ethnicity (NIH/OMB) Unknown or Not Reported | 0 Participants | 0 Participants | 0 Participants |
| Race (NIH/OMB) American Indian or Alaska Native | 0 Participants | 0 Participants | 0 Participants |
| Race (NIH/OMB) Asian | 2 Participants | 3 Participants | 5 Participants |
| Race (NIH/OMB) Black or African American | 5 Participants | 6 Participants | 11 Participants |
| Race (NIH/OMB) More than one race | 1 Participants | 0 Participants | 1 Participants |
| Race (NIH/OMB) Native Hawaiian or Other Pacific Islander | 0 Participants | 0 Participants | 0 Participants |
| Race (NIH/OMB) Unknown or Not Reported | 0 Participants | 0 Participants | 0 Participants |
| Race (NIH/OMB) White | 26 Participants | 19 Participants | 45 Participants |
| Sex: Female, Male Female | 25 Participants | 7 Participants | 32 Participants |
| Sex: Female, Male Male | 9 Participants | 21 Participants | 30 Participants |
Adverse events
| Event type | EG000 affected / at risk | EG001 affected / at risk |
|---|---|---|
| deaths Total, all-cause mortality | — / — | — / — |
| other Total, other adverse events | 0 / 34 | 0 / 28 |
| serious Total, serious adverse events | 0 / 34 | 0 / 28 |
Outcome results
Primary
Gross Weekly Purchasing of Fruits and Vegetables
Gross weekly purchasing of fruits and vegetables from the discounted items list in $
Time frame: week
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Discount Intervention | Gross Weekly Purchasing of Fruits and Vegetables | 5.57 $ | Standard Error 3.26 |
| Control | Gross Weekly Purchasing of Fruits and Vegetables | 1.79 $ | Standard Error 2.06 |