MTHFR and cervical cancer: Fig. 3 showed that MTHFR C677T polymorphism was no significantly associated with invasive cervical cancer in T vs. C (OR = 1.21, 95%CI = 0.94–1.55), TT vs. CC, (OR = 1.28, 95% CI = 0.88–1.87), and TT+CT vs. CC (OR = 1.20, 95% CI = 0.88–1.64).