Author Year Type Ethnicity Country Genotye Assay Source of Control Cases Controls Yang 2012 Pancreatic Asian China PCR-RFLP Population 926 368 Lang 2012 Pancreatic Asian China PCR-RFLP Population 651 602 Cheng 2011 Esophagus Asian China PCR-RFLP Population 205 205 Cozar 2007 Colon, European Spain TaqMan Hospital 176 221 Dilmec 2008 Colorectal European Turkey RFLP Hospital 162 56 Gu 2010 Hepatocellular Asian China PCR-LDR Hospital 367 407 Hadinia 2007 Colorectal Asian Iran RFLP, PCR-ARMS Hospital 190 105 Hadinia 2007 Gastric Asian Iran RFLP, PCR-ARMS Hospital 190 43 Hu 2010 Hepatocellular Asian China TaqMan Population 854 853 Hou 2010 Gastric Asian China PCR-ARMS NA 205 262 Kammerer 2010 Oral European German RT-PCR Hospital 40 83 Mahajan 2008 Gastric European Poland TaqMan Population 411 301 Qi 2010 Colorectal Asian China PCR-LDR NA 124 407 Solerio 2005 Colorectal European Italy RFLP Hospital 238 132 Sun 2008 Esophagus Asian China RFLP Hospital 1008 1010 Sun 2008 Gastric Asian China RFLP Hospital 530 530 Wong 2006 Oral Asian China RFLP Hospital 147 118

Table 1: Main characteristics of included studies in the meta-analysis.

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