Effect of Taxes and Subsides on Food Purchases in MothersGroceryNCT01619787

Price Changes and Hypothetical Food Purchases in Adult Grocery Shoppers

An observational study of Effect of Taxes and Subsides on Food Purchases in Mothers, run by State University of New York at Buffalo at 1 site in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record

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Trial summary

The goal of the proposed study is to apply experimental economics in an online grocery store shopping model to examine the effects of pricing on hypothetical food purchases Read more about this study

Who is it for?: Ages 18 to 65 years, women onlyHealthy volunteers can take part
Conditions the study is for: Effect of Taxes and Subsides on Food Purchases in Mothers
How many people: 217 participants
Where: 1 siteUnited States
Study dates: Jan 2011to Jun 2013
Phase: Observational
Are there results?: Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

Ages 18 to 65 years
Women only
Healthy volunteers accepted
Adult, Older adult

Study population: Lean and overweight Low and high socioeconimic status primary grocery shopper

Who may be able to join

18 or older primary shopper in the household, at least one child over 2 years of age

Who cannot join

eating disorders, not liking study foods

Trial locations and contacts

1 site in 1 country.

United States1 site

University at Buffalo
Buffalo, New York, 14214

Other trials in United States

About this study

Official title: Experimental Analysis of Price Changes and Food Purchases in Obese and Lean Mothers

The goal of the proposed study is to apply experimental economics in an online grocery store shopping model to examine the effects of pricing on hypothetical food purchases

Read the detailed description

Participants will be lean and overweight primary grocery shoppers aged 18 years and older. Participants will be considered lean if their body mass index (BMI = kg/m2) is less than 29.9, overweight if their BMI is greater than or equal to 30.12 To meet eligibility for the study, participants must be the guardian of a child at least 2 years or older, do the primary grocery shopping for the family, they must also report being weekly household grocery shoppers, and purchase the majority of their household's groceries once a week.

Conditions: Effect of Taxes and Subsides on Food Purchases in Mothers

What is being measured

The primary outcome is the main question the study is designed to answer.

Change in Energy Purchased as a Result of Taxes.
Change in total calories as a result of taxes of 12.5% and 25%.
Measured: Study Completion
Change in Energy Purchased as a Result of Subsidies
Change in total calories as a result of subsidies of 12.5% and 25%.
Measured: Study Completion

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

Jan 2011Jun 2013

First posted14 Jun 2012 (estimated)
Study startJan 2011
Primary completionJun 2013
Study completionJun 2013

Resources

Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
Publications (3)Papers the sponsor has linked to this study.
Other trials for Effect of Taxes and Subsides on Food Purchases in MothersStudies of the same condition, open and under way.
More trials run by State University of New York at BuffaloThe sponsor's other registered studies.
What the trial phases meanHow a treatment moves from first tests in people to approval.

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design

Study type: Observational
Time perspective: Cross-sectional
Enrolment: 217 participants (actual)

IDs, dates and publications

ClinicalTrials.gov ID: NCT01619787
Sponsor's protocol ID: 1090209-1-55244
Acronym: Grocery
Status last verified: Nov 2016
First submitted: 12 Jun 2012
Last updated: 10 Jan 2017
Results posted: Yes, on ClinicalTrials.gov
Data monitoring committee: No
Individual data sharing: No

Publications

Epstein LH, Paluch RA, Carr KA, Temple JL, Bickel WK, MacKillop J. Reinforcing value and hypothetical behavioral economic demand for food and their relation to BMI. Eat Behav. 2018 Apr;29:120-127. doi: 10.1016/j.eatbeh.2018.03.008. Epub 2018 Apr 3.
PubMed 29656049
Epstein LH, Finkelstein E, Raynor H, Nederkoorn C, Fletcher KD, Jankowiak N, Paluch RA. Experimental analysis of the effect of taxes and subsides on calories purchased in an on-line supermarket. Appetite. 2015 Dec;95:245-51. doi: 10.1016/j.appet.2015.06.020. Epub 2015 Jul 3.
PubMed 26145274
Epstein LH, Jankowiak N, Fletcher KD, Carr KA, Nederkoorn C, Raynor HA, Finkelstein E. Women who are motivated to eat and discount the future are more obese. Obesity (Silver Spring). 2014 Jun;22(6):1394-9. doi: 10.1002/oby.20661. Epub 2013 Dec 6.
PubMed 24311480

Study at a glance

From the registry record, last updated by the sponsor on 10 Jan 2017. Recruitment status is as the sponsor reported it: confirm with the study team.

Official title: Experimental Analysis of Price Changes and Food Purchases in Obese and Lean Mothers
ClinicalTrials.gov ID: NCT01619787
Acronym / sponsor ID: Grocery / 1090209-1-55244
Conditions: Effect of Taxes and Subsides on Food Purchases in Mothers
Study type: Observational
Recruitment status: Completed
Enrolment: 217 participants (actual)
Lead sponsor: State University of New York at BuffaloUniversity, hospital or other
Study start: Jan 2011
Primary completion: Jun 2013 (actual)
Study completion: Jun 2013 (actual)
First posted: 14 Jun 2012 (estimated)
Results: Posted 10 Jan 2017

Clinical summary

The research question as the sponsor registered it. This describes what the study plans to test, not what it found.

The goal of the proposed study is to apply experimental economics in an online grocery store shopping model to examine the effects of pricing on hypothetical food purchases

Detailed description

Study design

Time perspective: Cross-sectional

Who may qualify

Ages: 18 to 65 years
Sex: Female only
Healthy volunteers: Accepted
Age groups: Adult, Older adult
Study population: Lean and overweight Low and high socioeconimic status primary grocery shopper

Key inclusion criteria (1 listed)

18 or older primary shopper in the household, at least one child over 2 years of age

Key exclusion criteria (1 listed)

eating disorders, not liking study foods

Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.

Primary outcome

Change in Energy Purchased as a Result of Taxes.
Time frame: Study Completion
Change in total calories as a result of taxes of 12.5% and 25%.
Change in Energy Purchased as a Result of Subsidies
Time frame: Study Completion
Change in total calories as a result of subsidies of 12.5% and 25%.

Results and safety

Results posted to the registry on 10 Jan 2017, as reported by the sponsor. Figures are copied from the record, not re-analysed. Full results on ClinicalTrials.gov.

Participant flow

Group	Started	Completed
Online Grocery	217	212

Primary outcome: Change in Energy Purchased as a Result of Taxes.

Time frame: Study Completion. Least squares mean (Standard Error). Unit: Total Calories Purchased

Measure	Online Grocery n = 199	Lean Participants n = 97	Overweight/Obese Participants n = 102
Calories Purchased in the Regular Condition	10622.09 (329.04)	10507.62 (427.92)	10311.12 (456.04)
Calories Purchased in the Tax 12.5 Condition	10401.13 (292.12)	10512.95 (523.10)	9733.12 (385.34)
Calories Purchased in the Tax 25 Condition	10180.17 (304.13)	10471.42 (464.73)	10184.04 (436.78)

Population analysed: Data is reported for 199 participants. Out of 217 participants who started the study, 5 participants were lost to follow up, 1 participant shopped in the same store twice, 2 participants had conditions that would affect shopping, 2 participants did not report minority status and 8 male participants were excluded due to the small sample number.

Primary outcome: Change in Energy Purchased as a Result of Subsidies

Time frame: Study Completion. Least squares mean (Standard Error). Unit: Total Calories Purchased

Measure	Online Grocery n = 199	Lean Participants n = 97	Overweight/Obese Participants n = 102
Calories Purchased in the Regular Condition	10548.69 (316.69)	10507.63 (437.92)	10311.12 (456.04)
Calories Purchased in the Subsidy 12.5 Condition	10369.12 (283.95)	10176.01 (442.21)	9704.67 (405.05)
Calories Purchased in the Subsidy 25 Condition	10189.55 (300.85)	11036.01 (519.23)	10509.31 (426.99)

Adverse events

Time frame: Adverse Events were collected at each of six study sessions scheduled one week apart.. Other adverse events reported at 0% frequency or more

Group	Serious adverse events	Other adverse events	Deaths
Online Grocery	0 of 217 (0%)	0 of 217 (0%)	Not reported

Loading the posted results from ClinicalTrials.gov…

Research links

Official record on ClinicalTrials.govLast updated by the sponsor 10 Jan 2017.
Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
Derived from this study: PubMed 29656049Epstein LH, Paluch RA, Carr KA, Temple JL, Bickel WK, MacKillop J. Reinforcing value and hypothetical behavioral economic demand for food and their relation to BMI. Eat Behav. 2018 Apr;29:120-127. doi: 10.1016/j.eatbeh.2018.03.008. Epub 2018 Apr 3.
Derived from this study: PubMed 26145274Epstein LH, Finkelstein E, Raynor H, Nederkoorn C, Fletcher KD, Jankowiak N, Paluch RA. Experimental analysis of the effect of taxes and subsides on calories purchased in an on-line supermarket. Appetite. 2015 Dec;95:245-51. doi: 10.1016/j.appet.2015.06.020. Epub 2015 Jul 3.
Derived from this study: PubMed 24311480Epstein LH, Jankowiak N, Fletcher KD, Carr KA, Nederkoorn C, Raynor HA, Finkelstein E. Women who are motivated to eat and discount the future are more obese. Obesity (Silver Spring). 2014 Jun;22(6):1394-9. doi: 10.1002/oby.20661. Epub 2013 Dec 6.
Individual participant dataSharing planned: No

Referral and contact

AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.

Leonard H Epstein, PhD principal investigator

University at Buffalo

1 site in 1 country: see every site and its status.

Questions about this trial

What is this clinical trial studying?

An observational study of Effect of Taxes and Subsides on Food Purchases in Mothers, run by State University of New York at Buffalo at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 1 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 10 Jan 2017. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

Yes. Results are posted in the registry (first posted 10 Jan 2017). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Change in Energy Purchased as a Result of Taxes. (time frame: Study Completion). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT01619787, which also lists 3 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 10 Jan 2017; AzTrials last refreshed its copy on 8 Nov 2026.