Association of Combined Maternal-Fetal TNF-𝛼 Gene G308A Genotypes with Preterm Delivery: A Gene-Gene Interaction Study

Table 2

Triad counts in control group and case group by genotype.

Mating-	Triad genotype	Control Group	Case Group
type^#	(MFC)*	(𝑁=247)	(𝑁=250)
1	222	2	0
2	212	2	3
2	211	2	6
2	122	0	1
2	121	4	0
3	201	4	1
3	021	0	0
4	112	4	4
4	111	4	1
4	110	4	5
5	101	13	3
5	100	6	0
5	011	6	1
5	010	4	1
6	000	192	224

^#Mating-type: decided by the number of copies of allele the parents carrying.
*Triad genotype (MFC): copies of the variant in mother, father, and child.
0: homozygous wild type; 1: heterozygous variant type; 2: homozygous variant type.