Table 1.

Basic characteristics of participants.

	Patients n = 736
	n	%	IQR
Maternal age in years (y)
18–25 y	24	3.3	2.1–4.8
26–30 y	219	29.8	26.5–33.2
31–35 y	350	47.6	43.9–51.2
36–40 y	117	15.9	13.3–18.7
> 40 y	26	3.5	2.3–5.1

	n	%	95% CI
Marital/relationship status
Single	57	7.7	5.9–9.9
Married	421	57.2	53.5–60.8
Cohabitation	138	18.8	16.0–21.8
In relationship	118	16.0	13.5–18.9
Divorced	2	0.3	0.0–1.0
Nationality
Swiss	532	72.3	68.9–75.5
French	122	16.6	14.0–19.5
Belgium	31	4.2	2.9–5.9
German	13	1.8	0.9–3.0
Italian	8	1.1	0.5–2.1
Other	30	4.1	2.8–5.8
Working hours per week
Less than 40 h a week	419	56.9	53.3–60.5
40 h a week	110	14.9	12.4–17.7
More than 40 h a week	207	28.1	24.9–31.5
Family income per year (CHF-Swiss francs)
Less than 90,000 CHF	216	29.3	26.1–32.8
Around 90,000 CHF	71	9.6	7.6–12.0
More than 90,000 CHF	435	59.1	55.5–62.7
Unknown	14	1.9	1.0–3.2
Higher educational level
No scholar education	4	0.5	0.1–1.4
Secondary school 12–15 years	19	2.6	1.6–4.0
Secondary school 15–18 years	16	2.2	1.2–3.5
Diploma	120	16.3	13.7–19.2
Bachelor degree	167	22.7	19.7–25.9
Master degree	312	42.4	38.8–46.1
Doctorate degree/PhD	95	12.9	10.6–15.5
Unknown	3	0.4	0.1–1.2