Table 4. Characteristics of the studies in meta-analysis.
| Authors | Year | Country | Ethnicity | Study design | Number cases/controls | Region of GC | Genotyping method |
|---|---|---|---|---|---|---|---|
| Rogoveanu | 2017 | Romania | Caucasians | HB | 111/288 | Non-GCA | Taqman |
| Rogoveanu | 2017 | Romania | Caucasians | HB | 31/288 | GCA | Taqman |
| Poltronieri-Oliveira | 2017 | Brazil | Caucasians | HB | 150/239 | Non-GCA | PCR-RFLP |
| Cai | 2015 | China | Asians | PB | 363/969 | Non-GCA | MassARRAY |
| Wu | 2013 | China | Asians | HB | 200/211 | Mixed | PCR-RFLP |
| Pu | 2013 | China | Asians | HB | 196/504 | Non-GCA | PCR-RFLP |
| Ahn | 2013 | Korea | Asians | HB | 461/447 | Non-GCA | PCR-RFLP |
| Okubo | 2010 | Japan | Asians | HB | 552/697 | Non-GCA | PCR-RFLP |
| Torruella-Loran | 2019 | Ten European countries | Caucasians | PB | 365/1284 | Mixed | PCR-RFLP |
| Tang | 2019 | China | Asians | HB | 305/1677 | GCA | SNPscan |
| Tang | 2019 | China | Asians | HB | 758/1677 | GCA | SNPscan |
| Our study | 2020 | China | Asians | HB | 490/1476 | Non-GCA | SNPscan |
GC: gastric cancer;
GCA: gastric cardiac adenocarcinoma;
H-B: hospital-based;
P-B: population-based;
PCR-RFLP: polymerase chain reaction-restriction fragment length polymorphism.