Figure 1.
PRISMA flow diagram of study selection process (a) articles involving TGF-beta 1 genetic variants and (b) articles involving plasma concentration of TGF-beta1.
Table 1.
Detailed characteristics of all eligible studies for the association with TGF gene polymorphisms and PE.
Table 2.
Characteristics of studies on plasma TGF-beta 1 levels and PE included in the systematic review.
Figure 2.
Meta-analysis for the association of 869 T>C polymorphism with PE risk under a dominant model (TT vs. (TC+CC)) using a fixed-effects model.
Table 3.
Main results of the pooled ORs in meta-analysis for the association between the 869 T>C polymorphism and PE.