Table 1.

Demographic information corresponding to participants’ socioeconomic status across all studies.

Variable	Study 1		Study 2		Study 3
	n	%	n	%	n	%
Family income
<1.000€	45	12.3	279	34.4	23	11.5
1.000€–2.000€	139	37.9	328	40.4	85	42.5
2.000€–3.000€	82	22.3	123	15.1	46	23
3.000€–4.000€	49	13.4	47	5.8	19	9.5
4.000€–5.000€	15	4.1	16	2	11	5.5
>5.000€	13	3.5	19	2.3	4	2
Not reported	24	6.5	–	–	12	6
Maternal education
Primary school	75	20.4
Secondary education/school graduate	87	23.7
Vocational training	55	15
High school/diploma	29	7.9
University not completed	14	3.8
University completed	98	26.7
Doctorate	–	–
Not reported	9	2.5
Paternal education
Primary school	82	22.3
Secondary education/school graduate	62	16.9
Vocational training	48	13.1
High school/diploma	44	12
University not completed	24	6.5
University completed	97	26.4
Doctorate
Not reported	10	2.7
Participant education
Primary school			35	4.3	19	9.5
Secondary education/school graduate			87	10.7	25	12.5
Vocational training			122	15	22	11
High school/diploma			59	7.3	26	13
University not completed			129	15.9	34	17
University completed			367	45.2	71	35.5
Doctorate			13	1.6	–	–
Not reported			–	–	3	1.5