Review Article
Genetic Polymorphisms in the RAD51 Gene with a Risk of Head and Neck Cancer and Esophageal Cancer: A Meta-Analysis
Table 1
The detailed characteristics of included studies.
| First name (year) | Country | Ethnicity | Control type | Sample size cases/controls | Genotyping method | Cancer type |
| Lu (2007) | USA | Caucasian | HCC | 716/719 | PCR-RFLP | HNC | Werbrouck (2008) | Belgium | Caucasian | HCC | 152/157 | PCR | HNC | Sliwinski (2010) | Poland | Caucasian | HCC | 191/353 | PCR-RFLP | HNC | Gresner (2012) | Poland | Caucasian | PCC | 81/111 | PCR | HNC | Romanowicz-Makowska (2012) | Poland | Caucasian | PCC | 253/253 | PCR-RFLP | HNC | Xue-Jiao (2013) | China | Asian | HCC | 123/61 | PCR-RFLP | EC | Shu-Xiang (2014) | China | Asian | PCC | 316/316 | PCR-RFLP | EC | Kayani (2014) | Pakistan | Asian | HCC | 200/150 | PCR-RFLP | HNC | Ming-Zhong (2014) | China | Asian | HCC | 219/258 | PCR-RFLP | EC | Santos (2018) | Brazil | Unknown | HCC | 126/130 | TaqMan | HNC |
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HCC: hospital-based case control; PCC: population-based case control; PCR: polymerase chain reaction; RFLP: restriction fragment length polymorphism.
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