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

Table 1

Some general characteristics of mothers and children.

Variable	Control	Case		Preterm Delivery
	Group	Group	OR	95%CI		P-value
Age, year
19-	74	72	1	—	—	—
23-	99	105	1.09	0.72–1.67		.679
27-	74	73	1.01	0.64–1.60		.953
Education
≤ elementary school	75	70	1	—	—	—
= middle school	133	145	1.18	0.79–1.75		.431
≥ middle school	39	35	0.95	0.54–1.66		.857
Occupation
Farmer	110	111	1	—	—	—
worker	51	51	0.98	0.62–1.57		.935
Housewife	86	88	1.01	0.68–1.50		.955
Parity
No	171	158	1	—	—	—
Yes	76	92	1.28	0.89–1.86		.187
Children gender
Male	108	121	1	—	—	—
Female	139	129	0.82	0.58–1.17		.282