Results of meta-analysis for various genetic models of MTHFR C677T polymorphism.

Ph: P values for heterogeneity from Q-test, CIN: cervical intraepithelial neoplasia. Data in bold: statistical significance at 0.05 level.P值：Q检验所得异质性检验P值；CIN：宫颈上皮内瘤变（cervical intraepithelial neoplasia）。加粗数据：表示在0.05显著性水平下具有统计学意义。