Table 3
Presence of C677T polymorphism in the MTHFR
C677T genotype
Daytime workers n (%)
Shift workers n (%)
C677T polymorphism: CC, homozygous for the wild type; CT, heterozygous, and TT, homozygous for the mutation.
CC
11 (50.00)
19 (63.33)
CT
9 (41.00)
11 (36.67)
TT
2 (9.00)
0 (0)