Study Characteristics of genotypes in gastric cancer cases and controls in the analysis of XPD Asp312Asn polymorphism.

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Data of cardia type of gastric cancer were accessible;
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Data of noncardia type of gastric cancer were accessible;
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Data of sporadic diffuse-type of gastric cancer were accessible;
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Data of the smoking habits of gastric cancer were accessible. RFLP: Restriction fragment length polymorphisms; Lightcycler: Polymorphisms were analysed in a LightCycler instrument by melting curve analysis of a fluorescently labelled sensor probe specific for each analysed variant, following manufacturer instructions (Roche Diagnostics, Mannheim, Germany), the results that were confirmed by a second genotyping method, such as restriction analysis, SSCP analysis or direct sequencing; ARMS: Amplification refractory mutation system.