From: Aberrant GSTP1 promoter methylation is associated with increased risk and advanced stage of breast cancer: a meta-analysis of 19 case-control studies
Study groups
Number
OR (95 % CI)
Heterogeneity
Ph
I2 (%)
χ 2
Stage
8
1.84 (1.32, 2.58)
0.20
29
9.81
Grade
5
0.74 (0.43, 1.26)
0.69
0
2.27