Table 2. Associations between covariates and maternal seropositivity to HSV-2 and Chlamydia trachomatis IgG among control subjects.

	HSV-2			C. trachomatis
	Positive	Negative	p-value	Positive	Negative	p-value
Characteristic	n=121	n=819		n=32	n=159
Maternal age, mean (SD)	29.2 (4.7)	27.8 (5.1)	0.01	27.6 (4.7)	28.7 (4.7)	0.20
Paternal age, mean (SD)	31.8 (5.7)	30.2 (5.6)	0.003	30.0 (5.4)	30.7 (5.2)	0.51
Male, %	67.8%	56.3%	0.02	64.5%	59.4%	0.70
>=1 previous birth (versus 0), %	63.6%	61.4%	0.64	46.9%	61.6%	0.12
Maternal education, %			0.95			0.53
Secondary school only	23.1%	22.2%		15.6%	17.0%
Vocational degree/secondary school graduate	57.9%	58.0%		75.0%	62.3%
College degree/bachelor university degree	14.1%	13.6%		6.3%	15.7%
Master degree/licenciate degree/PhD	5.0%	6.3%		3.1%	5.0%
Paternal education, %			0.37			0.15
Secondary school only	27.3%	25.8%		38.7%	20.1%
Vocational degree/secondary school graduate	60.3%	57.0%		51.6%	60.4%
College degree/bachelor university degree	8.3%	8.3%		3.2%	5.0%
Master degree/licenciate degree/PhD	4.1%	8.9%		6.5%	14.5%
Maternal psychiatric disorders
Schizophrenia/non-affective psychosis	3.3%	1.6%	0.26	0.0%	1.9%	1
Affective disorders	11.6%	7.8%	0.16	3.1%	5.0%	1
Any psychiatric disorder	18.2%	13.2%	0.14	6.3%	9.4%	0.74
Parental psychiatric disorders
Schizophrenia/non-affective psychosis	5.8%	2.7%	0.07	3.1%	3.1%	1
Affective disorders	17.4%	12.5%	0.14	9.4%	9.4%	1
Any psychiatric disorder	27.3%	22.7%	0.27	12.5%	17.0%	0.79
Gestational age <37 weeks (versus >=37 weeks)	3.8%	5.2%	0.79	0.0%	5.9%	1
Gestational week of blood draw	10.6 (3.6)	10.9 (4.0)	0.56	9.6 (2.6)	10.3 (3.8)	0.33
Twin birth (versus singleton)	5.0%	4.3%	0.74	3.1%	3.1%	1.0
Municipality of birth			0.14			0.02
Rural	23.1%	30.9%		12.5%	34.0%
Semi-urban	12.4%	13.9%		12.5%	17.6%
Urban	64.5%	55.2%		75.0%	48.4%
Province of birth			0.04			0.28
Eastern Finland	14.9%	15.0%		6.3%	18.2%
Northern Finland	9.1%	14.8%		9.4%	14.5%
Southern Finland	47.1%	34.7%		40.6%	33.3%
Western Finland	28.9%	35.5%		43.8%	34.0%