Global Positioning System (GPS) Exposure to Environments & Relations With

Status Completed

Clinical Trial Summary

The prevalence of overweight and obesity are increasing worldwide. In the U.S., approximately 85,000 new cancer cases per year are related to obesity. Understanding lifestyle behaviors, their causes, and relations to cancer are critical. Where people spend their time during the day may be related to their risk of getting cancer. This project will assess behaviors in different locations across the day and relate exposure to different environments to biological outcomes.

Clinical Trial Description

The purpose of this study is to advance methods of cancer risk exposure assessment by measuring both neighborhood access and total environment exposure to healthy environments by dynamically integrating Global Positioning System (GPS) data with Geographical Information System (GIS) data. We hypothesize that dynamic GPS based measures of environmental exposure will be more strongly related to behavior and insulin and inflammation biomarkers than static address based GIS measures of access.

Primary Aim:

To compare Dynamic vs Static GIS measures of physical activity (PA) supportivity and their associations with PA behaviors, body mass index (BMI), and biological markers.

Secondary Aim:

To compare Dynamic vs Static GIS measures of access to healthy food and their associations with dietary intake, BMI, and biological markers.

Exploratory aim:

Social environment (e.g. eating with others) has been identified as an important determinant of health, but assessment of this has been limited to self-report through surveys or text prompts. Images from a person worn camera (the SenseCam) provide an objective and continuous assessment of social environment e.g. number of social interactions per day, eating alone or with others. In a subsample of participants (N=30), we propose to explore whether portable SenseCam measures of social interactions & social behaviors from person view images are more strongly related to breast and colon cancer risk factors than self-reported social environment measures. Behaviors and built environments (especially food locations) can also be coded to validate the accuracy of the GIS measures and the machine learned behavior categories employed in the full sample. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT02094170
Study type	Observational
Source	University of California, San Diego
Contact
Status	Completed
Phase
Start date	July 2014
Completion date	September 29, 2017

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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.

Global Positioning System (GPS) Exposure to Environments & Relations With Biomarkers of Cancer Risk

Clinical Trial Summary

Clinical Trial Description

Study Design

Related Conditions & MeSH terms