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Background: Smoking rates are higher among adolescents in South Korea than among those in other Asian countries. Researchers have reported associations between the presence of licensed tobacco retailers and adolescent smoking rates. However, few researchers have examined the factors that influence adolescent smoking including those that are intrapersonal, interpersonal or related to the tobacco retailers' environment. Aim: The purpose of this study was to describe factors related to the students, the licensed tobacco retailers and the schools and how those factors are associated with adolescent smoking outcomes such as tobacco marketing receptivity, lifetime smoking and current smoking. Methods: The survey data were gathered from 740 South Korean adolescents, and geographic data for 3488 licensed tobacco retailers were also used. Geographic Information Systems and multilevel modeling were used to describe the variables and determine the factors associated with smoking outcomes in the sample. Results: The factors that influenced receptivity to tobacco marketing included the presence of peers who smoke and the frequencies of licensed tobacco retailers passed on the way to school. The factors that influenced lifetime smoking included gender, perceived economic status, weekly income, the presence of siblings or peers who smoke and frequencies of licensed tobacco retailers passed on the way to school. The factors that influenced current smoking included gender, weekly income, and the presence of siblings or peers who smoke. Conclusions: These factors will guide adolescent tobacco prevention programs and policies. Implications for nursing practice and health policy: The study's implications for nursing practice and health policy are that school nurses and public health nurses need to be encouraged to use retailer-related factors in adolescent smoking-prevention programs. There is also a need for zoning and licensing regulations to restrict licensed tobacco retailers in areas that adolescents frequent, including schools. [ABSTRACT FROM AUTHOR]