MTHFR and hypertensive disorder: The possible association of the MTHFR genotypes with potential risk factors for hypertension were based on three genetic modes of inheritance, such as the co-dominant mode (MTHFR C/T vs. MTHFR C/C, MTHFR T/T vs. MTHFR C/C), dominant mode (MTHFR C/T plus MTHFR T/T vs. MTHFR C/C), and recessive mode (MTHFR T/T vs. MTHFR C/C plus MTHFR C/T) models.