Table 1. Socio-demographic characteristics of the participants.

Variable	n
Age (years)
11	2
12	1
14	1
15	3
16	3
Felt gender identity
Boy / Male	7
Girl / Female	3
School level
5º Primaria (Grade 5)	1
6º Primaria (Grade 6)	1
1º ESO (Grade 7)	1
2º ESO (Grade 8)	1
3º ESO (Grade 9)	3
4º ESO (Grade 10)	2
1º Bachiller (Grade 11)	1
Marital status of the mother
Married	7
Divorced	2
Single	1
Mothers’ educational level
Primary education	3
Secondary education	2
High education	1
Vocational training	2
University education	2

ESO: Educación Secundaria Obligatoria (Secondary Education).