Meta-analyses of MTHFR C677T polymorphism and cervical cancer susceptibility after omitting the studies.

Abbreviations and definitions: CI, 95% confidence intervals; OR, odds ratio; PQ, P value of Q test for heterogeneity; F, fixed-effect models.aMTHFR C677T polymorphism and cervical cancer susceptibility after excluding the three studies of Shekari M et al., Ma XC et al., and Zoodsma M et al.bMTHFR C677T polymorphism and cervical cancer susceptibility after excluding the two studies of Ma XC et al. and Zoodsma M et al.cMTHFR C677T polymorphism and cervical cancer susceptibility after excluding the study of Ma XC et al.