Obesity Clinical Trial
Official title:
Food Insecurity, Obesity, and Impulsive Food Choice
The objective of this study is to determine the relations among food insecurity status,
obesity, and impulsive food choice patterns and to test the extent to which a mindful eating
strategy reduces impulsive choice for food. The central hypothesis is that food-insecure
individuals will demonstrate more impulsive food choice patterns and demonstrate a greater
likelihood of obesity than individuals who are food secure. Two specific aims are proposed:
Specific aim #1: Determine the relation between food insecurity, obesity, and impulsive food
choice patterns in women. The working hypothesis is that food-insecure individuals,
especially those that are obese, will exhibit more impulsive food choice patterns than
food-secure individuals.
Specific aim #2: Determine the efficacy of an extended mindfulness-based eating strategy on
impulsive choice patterns among food insecure women. The working hypothesis is that mindful
eating will reduce impulsive food choice patterns relative to baseline and control
conditions, and will persist to follow-up. The investigators expect mindful eating to reduce
impulsive choice compared to control conditions, despite food security status.
The investigators will recruit women from a variety of community locations, including grocery
stores, public schools, churches, local food pantries, and from governmental food assistance
programs, such as Women, Infants, and Children and the Supplemental Nutrition Assistance
Program. Participants will be recruited heavily from settings where low to moderate food
security is prevalent, but not severe food security. Food insecurity status will be
determined by completion of the 18-item United State Department of Agriculture (USDA) Food
Security Module, and will be scored based on standardized scoring techniques. Participants
will provide informed consent, be weighed and measured, and complete several questionnaires
that measure diet quality, time since last pay check or food benefits as well as other
information, such as age, education, ethnicity, employment status, income, marital status,
intelligence, nicotine dependence, and alcohol and drug use. Participants will complete
baseline delay and probability discounting tasks for food and money as measures of
impulsivity.
Then, food insecure women only will be randomly assigned to one of three arms: mindful
eating, a nutrition movie, or a control. Participants in the mindful eating group will be
given four foods and receive a 50 min mindful eating workshop. Individuals in the nutrition
movie condition also will be given the same four foods, but will view a 50 minute nutrition
video. The third group (no treatment control) will receive the four foods, but no treatment.
A Time 2 measures of discounting will be administered immediately after the treatments.
Then, for the next week after Session 2, participants in the mindful eating group will be
asked to practice mindful eating throughout the week. Research assistants will send text
message prompts to participants reminding them to record when they practice mindful eating
during meals twice per day for one week. Those in the Nutrition movie will receive the same
number of prompts during a one week period as the mindful eating group, but they will give
give one-word answers to questions about nutrition. Those in the control group will do
nothing during the week.
After one week of mindful eating (or controls), all participants will be asked to return to
the laboratory and complete a third set of discounting tasks.
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