Table 2 Characteristics of studies included in the meta-analysis
From: EGF +61A/G polymorphism contributes to increased gastric cancer risk: evidence from a meta-analysis
First author (Year) | Country | Ethnicity | Sample size (case/control) | Genotyping methods | Matching criteria | Source of control | GC ascertainment | Quality scores | HWE (Pvalue) |
|---|---|---|---|---|---|---|---|---|---|
Hamai 2004 | Japan | Asian | 200/230 | PCR-RFLP | Age, sex, and H. pylori infection | HB | NR | 5.5 | 0.647 |
Goto 2005 | Japan | Asian | 202/450 | PCR-CTPP | NR | PB | Pathologically confirmed | 6.5 | 0.537 |
Jin 2007 | China | Asian | 617/660 | PCR-RFLP | Age, sex, smoking and drinking | PB | Histopathologically confirmed | 7.0 | 0.407 |
Araujo 2011 | Portugal | Caucasian | 207/984 | PCR-RFLP | NR | HB | Histologically confirmed | 4.5 | 0.010 |
Yang 2012 | China | Asian | 207/318 | PCR-RFLP | Age, and sex | HB | Histologically confirmed | 6.5 | 0.272 |
Lin 2012 | China | Asian | 114/120 | PCR-RFLP | Sex | HB | Pathologically confirmed | 5.0 | 0.485 |