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Feng, "Using GPS and videography to assess exposure of teenagers to tobacco outlets in Chengdu, China," 2006
USC thesis in Environmental Health Sciences.
August 21, 2009
Guanjun Feng, M.S
Abstract (Summary)
The pilot study, undertaken in Chengdu, China, in Summer 2005, focuses on the spatial aspects of assessing exposure to tobacco outlets, using GPS and geolocation technology. A sample of 55 middle school students was selected from a large cohort of the China Seven City Study (CSCS). We trained 30 data collectors to use GPS to collect the students' home addresses and details of each outlet, the store type, its visibility, and the signs for tobacco advertisements. Buffer analyses in ArcGIS gave us the store density and distance to the nearest tobacco store within distances of 250, 500, 750 and 1000 meters. With the GPS and geolocation technology, we quantified objective and more precise assessment of the teenagers' exposure to tobacco outlets. This study is a first step towards developing a complex model for the CSCS that examines the relationship between teenagers' exposure to these outlets and their addictive behavior.
Advisor: Jerrett, Michael, Johnson, Anderson
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