Etiology of intellectual disability in individuals from special education schools in the south of Brazil

BMC Pediatrics

Table 2 Demographic information of research participants (n = 849)

Reported consanguinity among the parents of the participants	n		%
Consanguinity present	34		4
No Consanguinit	631		74.3
Unknown	184		21.7
Students' skin color statement^a
Yellow	2		0.2
White	682		80.3
Black	34		4
Brown	66		7.8
Did not answer	65		7.7
Reported ethnic background.	Paternal		Maternal
	n	%	n	%
European	174	20.5	201	23.7
German	78	9.2	96	11.3
Italian	58	6.8	59	7
Portuguese	22	2.6	32	3.8
Other European	16	1.9	14	1.7
Asians	3	0.4	3	0.4
Africans	20	2.4	21	2.5
Amerindians	14	1.7	19	2.2
Other Americans	7	0.8	3	0.4
Brazilians^a	412	48.5	408	49
Did not answer	219	25.8	194	22.9
Parents' level of education.	Paternal		Maternal
Scholarity
No education	22	2.6%	23	2.7%
Elementary school (1rst to 4th class)	263	31%	316	37.2%
Junior high school (5th to 8th)	121	14.3%	128	15.1%
High school	155	18.3%	155	18.3%
Graduate	81	9.5%	100	11.8%
Missing data	207	24.4%	127	15%

^aClassification of skin color taken from the interviewee's self-identification, according to the Brazilian Institute of Geography and Statistics – IBGE

ISSN: 1471-2431