Table 1. Baseline characteristics of the sample, compared between single-way and ROPA patients, patients with and active vs. passive role, genetic vs. non-genetic mothers, and gestational vs. non-gestational mothers.
		All	Single-way vs. ROPA			Active vs. passive role			Genetic vs. non-genetic mother			Gestational vs. non-gestational mother
			Single-way	ROPA	P	Active	Passive	P	Genetic	Non-genetic	P	Gestational	Non-gestational	P
Age (mean)		35.8	34.8	36.2	0.08	35.4	36.6	0.15	35.2	36.4	0.11	35.5	36.1	0.41
Years of relationship (mean)		7.8	7.3	8.0	0.31	7.7	8.0	0.64	7.8	7.7	0.94	7.8	7.8	0.98
Level of education (%)	Basic	2.3	1.6	2.6	0.48	1.4	4.0	0.35	0.9	3.7	0.71	1.7	3.0	0.60
	Highschool	23.7	23.4	23.8		23.6	23.9		22.6	24.8		24.3	23.0
	Graduation	40.0	39.1	40.4		41.7	36.6		41.5	38.5		43.5	36
	Master	25.8	34.4	26.5		29.9	26.8		30.2	27.5		27.0	31.0
	PhD	5.1	1.6	6.6		3.5	8.5		4.7	5.5		3.5	7
Previous children (yes - %)		39.6	39.2	40.6	0.88	40.4	38.0	0.77	38.0	41.3	0.68	41.0	38.0	0.68