Table 2 MTHFR genotype frequency distribution among PTB categories
Polymorphism | Genotype/allele | Extreme PTB (< 28 weeks) (N = 8) n f (%) | Very PTB (28–32 weeks) (N = 16) n f (%) | Moderate PTB (32–37 weeks) (N = 76) n f (%) | Chi-square and p value |
|---|---|---|---|---|---|
C677T | CC | 2 (25%) | 7 (43.75%) | 27 (35.53%) | – |
CT | 5 (62.5%) | 9 (56.25%) | 47 (61.84%) | 0.53 ns | |
TT | 1 (12.5%) | – | 2 (2.63%) | 6.43* |