Table 1. Demographic, socioeconomic and clinical characteristics of mothers and their microcephalic newborns hospitalized at the IFF/Fiocruz, Rio de Janeiro, from February to September 2016.

Variable	Category	n	%
Maternal demographic, clinical and socioeconomic characteristics
Age (years)	<18	2	9.5
	18-34	19	90.5
Schooling (years of study)	8-11	18	85.7
	≥12	3	14.3
Maternal income	With income (usual occupation)	11	52.4
	No income (student/housewife)	10	47.6
Symptomatic exposure to Zika virus during pregnancy	Yes	13	61.9
	No	8	38.1
Marital status	With partner	4	20
	Without partner	16	80
Prenatal care consultations	<6	7	38.9
	>6	11	61.1
Marital status	With partner	4	20
	Without partner	16	80
Prenatal care visits	<6	7	38.9
	>6	11	61.1
Birth-related
Gender	Male	9	42.9
	Female	12	57.1
Birth type	Normal	15	71.4
	Cesarean	6	28.6
Apgar 5th minute	≤7	0	0
	>7	21	100
Weight-for-age z-score	<-2	3	14.3
	≥- 2 and ≤2	18	85.7
Height-for-age z-score	<-2	3	14.3
	≥- 2 and ≤2	17	80.9
	>2	1	4.8
BMCa-for-age z-score	<-2	5	23.8
	≥- 2 and ≤2	15	71.4
	>2	1	4.8
Weight-for-height z-score	<-2	5	23.8
	≥- 2 and ≤2	16	76.2
HCb-for-age z-score	<-3	17	81
	>-3	4	19
Altered brain imaging
Hydrocephalus	Yes	7	33.3
	No	14	66.7
Calcification	Yes	19	90.5
	No	2	9.5
Ventriculomegaly	Yes	19	90.5
	No	2	9.5
Cerebellar hypoplasia Mega cisterna magna	Yes	3	14.3
	No	18	85.7
	Yes	5	23.8
	No	16	76.2

^aBMI - body mass index; ^b HC - head circumference.