Table 1.
Characteristics of studies included in the meta-analysis
| First author | Year | Source of control | Genotyping method | Sample size | Country of study | Ethnicity | |
|---|---|---|---|---|---|---|---|
|
| |||||||
| Cases | controls | ||||||
| Lee | 2005 | HB | MassARRAY | 782 | 587 | Korea | Asian |
| Sliwinski | 2005 | NA | PCR-RFLP | 150 | 150 | Poland | European |
| Webb | 2005 | PB | TaqMan | 1295 | 660 | Australia | European |
| Dufloth | 2005 | PB | PCR-RFLP | 78 | 119 | Brazil | American |
| Tarasov | 2006 | PB | PCR-RFLP | 151 | 191 | Russia | European |
| Costa | 2007 | PB | PCR-RFLP | 265 | 435 | Portugal | European |
| Antoniou | 2007 | NA | TaqMan | 4443 | 4069 | UK | European |
| Pharoah | 2007 | NA | TaqMan | 2160 | 2266 | UK | European |
| Hu | 2008 | NA | PCR | 71 | 85 | China | Asian |
| Brooks | 2008 | PB | PCR-RFLP | 606 | 611 | USA | American |
| Jakubowska | 2009 | PB | Simple Probe | 1007 | 1069 | Poland | European |
| Akisik | 2010 | NA | PCR-RFLP | 147 | 120 | Turkey | Asian |
| Jara | 2010 | HB | PCR-RFLP | 267 | 500 | Chili | American |
| Hosseini | 2012 | PB | PCR-RFLP | 294 | 315 | Poland | European |
| Smolarz | 2013 | NA | PCR-RFLP | 50 | 50 | Iran | Asian |
PCR: polymerase chain reaction; PCR-RFLP: PCR-restriction fragment length polymorphism; NA: not available; HB: hospital-based; PB: population-based; HWE: Hardy-Weinberg equilibrium.