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| ID | Type | Description | Link |
|---|---|---|---|
| U54GM104940 | U.S. NIH Grant/Contract | View source |
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| Name | Class |
|---|---|
| National Institute of General Medical Sciences (NIGMS) | NIH |
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The current pilot study will examine emergent hypotheses by investigating the role of psychological mechanisms in the relationship between food insecurity and obesity. This objective will be achieved via a cross-sectional, observational pilot study collecting quantitative and qualitative data.
This pilot study will investigate an emergent risk factor for obesity: food insecurity, which is defined as the limited or uncertain availability of nutritionally adequate and safe foods. While paradoxically linked, numerous studies have shown a significant association between food insecurity and obesity. Moreover, recent narrative works have developed new, untested hypotheses linking food insecurity and obesity positing the causal role of psychological mechanisms. Given this, this mixed method pilot study will collect new psychological data in a sample of food secure and food insecure adults with and without obesity to examine the connections between food insecurity, body weight, and psychological constructs. The overarching objective of the study is to gather pilot data to identify potentially new intervention targets that will be used in future studies to more rigorously investigate the relationship between food insecurity and obesity.
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| Measure | Description | Time Frame |
|---|---|---|
| Delay Discounting | Assessed via the 27-Item Monetary Choice Questionnaire, which measures bias toward smaller, immediate rewards versus larger, delayed rewards. This questionnaire presents participants with a set of 27 choices between smaller, immediate monetary rewards and larger, delayed monetary rewards. Participants who discount the value of the delayed rewards more steeply are considered to be more impulsive. An estimate of a participant's discounting rate (k) is calculated from the pattern of choices. Values of k range from 0.00016 (ln transformation -8.74) to 0.25 (ln transformation -1.39), with higher values indicating a greater preference for smaller, immediate rewards over larger, delayed rewards. K tends to be skewed, so a natural log (ln) transformation is utilized to approximate a normal distribution for statistical analyses. | Through study completion, an average of 1 hour and 30 minutes at Study Visit 1 |
| Measure | Description | Time Frame |
|---|---|---|
| Grit | Assessed using the 8-item Short Grit Scale, which measures trait-level perseverance and passion for long-term goals. Scores range from 1 (not at all gritty) to 5 (extremely gritty). | Through study completion, an average of 1 hour and 30 minutes at Study Visit 1 |
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Inclusion Criteria:
Exclusion Criteria:
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The target study sample will be 56 food secure and food insecure women and men aged 18 to 49 years with a BMI of 20.0 kg/m2 or greater.
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| Name | Affiliation | Role |
|---|---|---|
| Candice A Myers, Ph.D. | Pennington Biomedicial Research Center | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Pennington Biomedical Research Center | Baton Rouge | Louisiana | 70808-4124 | United States |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 32597739 | Derived | Myers CA, Beyl RA, Martin CK, Broyles ST, Katzmarzyk PT. Psychological mechanisms associated with food security status and BMI in adults: a mixed methods study. Public Health Nutr. 2020 Oct;23(14):2501-2511. doi: 10.1017/S1368980020000889. Epub 2020 Jun 29. |
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| ID | Title | Description |
|---|---|---|
| FG000 | Single Group | The study sample included a single group of 56 food secure and food insecure women and men aged 18 to 49 years with a BMI of 20.0 kg/m2 or greater. |
| Title | Milestones | Reasons Not Completed | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall Study |
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| ID | Title | Description |
|---|---|---|
| BG000 | Single Group | The study sample included a single group of 56 food secure and food insecure women and men aged 18 to 49 years with a BMI of 20.0 kg/m2 or greater. |
| Units | Counts |
|---|---|
| Participants |
|
| Title | Description | Population Description | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Denominator Units Selected | Denominators | Classes |
|---|---|---|---|---|---|---|---|---|---|
| Age, Continuous | Mean |
| Type | Title | Description | Population Description | Reporting Status | Anticipated Posting Date | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Time Frame | Units Analyzed | Denominator Units Selected | Arm/Group Information | Denominators | Classes | Analyses | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Primary | Delay Discounting | Assessed via the 27-Item Monetary Choice Questionnaire, which measures bias toward smaller, immediate rewards versus larger, delayed rewards. This questionnaire presents participants with a set of 27 choices between smaller, immediate monetary rewards and larger, delayed monetary rewards. Participants who discount the value of the delayed rewards more steeply are considered to be more impulsive. An estimate of a participant's discounting rate (k) is calculated from the pattern of choices. Values of k range from 0.00016 (ln transformation -8.74) to 0.25 (ln transformation -1.39), with higher values indicating a greater preference for smaller, immediate rewards over larger, delayed rewards. K tends to be skewed, so a natural log (ln) transformation is utilized to approximate a normal distribution for statistical analyses. | Posted | Mean | Standard Deviation | score on a scale (natural log) | Through study completion, an average of 1 hour and 30 minutes at Study Visit 1 |
|
Through study completion, which was a single study visit with an average of 1 hour and 30 minutes.
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| ID | Title | Description | Deaths (Affected) | Deaths (At Risk) | Serious Events (Affected) | Serious Events (At Risk) | Other Events (Affected) | Other Events (At Risk) |
|---|---|---|---|---|---|---|---|---|
| EG000 | Single Group | The study sample included a single group of 56 food secure and food insecure women and men aged 18 to 49 years with a BMI of 20.0 kg/m2 or greater. |
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| Title | Organization | Phone | Extension | |
|---|---|---|---|---|
| Candice A. Myers | Pennington Biomedical Research Center | 12257632849 | candice.myers@pbrc.edu |
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| Type | Includes Protocol | Includes SAP | Includes ICF | Document Label | Document Date | Document Uploaded Date | Document File Name |
|---|---|---|---|---|---|---|---|
| Prot_SAP | Yes | Yes | No | Study Protocol and Statistical Analysis Plan | Mar 8, 2018 | Jan 16, 2020 | Prot_SAP_000.pdf |
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| ID | Term |
|---|---|
| D009765 | Obesity |
| ID | Term |
|---|---|
| D050177 | Overweight |
| D044343 | Overnutrition |
| D009748 | Nutrition Disorders |
| D009750 | Nutritional and Metabolic Diseases |
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| years |
|
| Sex: Female, Male | Count of Participants | Participants |
|
| Race/Ethnicity, Customized | Count of Participants | Participants |
|
| Region of Enrollment | Number | participants |
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The study sample included a single group of 56 food secure and food insecure women and men aged 18 to 49 years with a BMI of 20.0 kg/m2 or greater. |
|
|
| Secondary | Grit | Assessed using the 8-item Short Grit Scale, which measures trait-level perseverance and passion for long-term goals. Scores range from 1 (not at all gritty) to 5 (extremely gritty). | Posted | Mean | Standard Deviation | score on a scale | Through study completion, an average of 1 hour and 30 minutes at Study Visit 1 |
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|
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| 0 |
| 56 |
| 0 |
| 56 |
| 0 |
| 56 |
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| D001835 |
| Body Weight |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |