Gene Variant May Decide Who Smokes and for How Long

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The variant (rs16969968) of the CHRNA5 gene identified in this study explains only a portion of smoking behavior, noted Pomerleau and colleagues. More information about how genes interact with social influences and other environmental factors is needed to achieve a more complete explanation of why people smoke and why it's so difficult to quit.

Making a connection between behavioral patterns in smoking to individual genotypes will require analysis of extensive data about behavior, genes and environmental influences, Pomerleau said.

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The U.S. Centers for Disease Control and Prevention has more about smoking and tobacco use.

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-- Robert Preidt