Table 1 Characteristics of studies included in this meta-analysis
First author (Year) | Country | Ethnicity | Sample size (case/control) | Genotyping methods | Matching criteria | Source of control | EC confirmation | Quality scores | HWE (P value) |
|---|---|---|---|---|---|---|---|---|---|
Walsh [11] | America | Caucasian | 73/79 | PCR-RFLP | NA | HB | NA | 5.5 | 0.650 |
Terry NHS [12] | America | Caucasian | 394/948 | PCR-RFLP | Age, menopausal status | PB | PC | 11 | 0.642 |
Terry WHS [12] | America | Caucasian | 122/368 | PCR-RFLP | Age, menopausal status | PB | PC | 11 | 0.180 |
Ashton 2009 [14] | Australia | Caucasian | 191/291 | TaqMan Assay | Age, gender | PB | HC | 9 | 0.493 |
Nunobiki [13] | Japan | Asian | 102/95 | PCR-RFLP | NA | HB | HC | 5 | 0.018 |
Zajac [18] | Poland | Caucasian | 152/100 | PCR-RFLP | NA | HB | HC | 6.25 | 0.701 |
Knappskog [19] | Norway | Caucasian | 910/2465 | TaqMan Assay | NA | HB | NA | 8 | 0.406 |
Yoneda [15] | Japan | Asian | 125/200 | PCR-RFLP | NA | PB | NA | 9 | 0.910 |