Table 2 Characteristics of studies included in this meta-analysis
First author (Year) | Country | Ethnicity | Genotyping methods | Matching criteria | Sample size (case/control) | Source of control | BC ascertainment | Quality scores | HWE(P value) |
|---|---|---|---|---|---|---|---|---|---|
Yao 2013 | China | Asian | TaqMan Assay | Age | 162/190 | HB | PC | 7 | 0.540 |
Menzel Tyrol 2004 | Austria | Caucasian | 5′ exonuclease assay | Region | 218/424 | PB | HC | 7.5 | 0.175 |
Menzel Prague 2004 | Czech | Caucasian | 5′ exonuclease assay | Age, region | 190/231 | PB | HC | 7 | 0.650 |
Siegelmann-Danieli 2002 | America | Caucasian | PCR-SSCP | Age, region | 346/235 | PB | HC | 6 | 0.869 |
Singh 2010 | India | Asian | PCR-RFLP | Age, smoking, region | 200/200 | HB | Other | 5.5 | 0.000 |
Hamajima 2002 | Japan | Asian | PCR-CTPP | NA | 237/640 | HB | HC | 6 | 0.046 |
Sarmanova 2004 | Czech | Caucasian | PCR-RFLP | Age, ethnicity | 238/310 | HB | HC | 6 | 0.576 |
Aston 2005 | America | Caucasian | PCR-RFLP | Age, region | 564/1212 | PB | Other | 8.5 | 0.549 |
Hong 2007 | America | Caucasian | TaqMan Assay | Age, ethnicity | 496/495 | PB | Other | 7 | 0.531 |
Lajin 2013 | Syria | Arab | ARMS-PCR | Ethnicity | 122/139 | PB | HC | 7.5 | 0.253 |