Table 1. Study population according to demographic, socioeconomic, and obstetric care variables. Federal District, Brazil, 2011. (n = 10,468).

Variable	Average	Standard deviation

Number of prenatal care visits	9.6	3.6
Number of prenatal care visits	n	%
Age (years)
< 20	958	9.2
≥ 20	9,510	90.8
Race
White	4,198	40.1
Non-white	6,270	59.9
Schooling
Elementary/Middle school	6,010	57.4
University	4,458	42.6
Registered in government programs^a
Yes	1,612	15.4
No	8,856	84.6
Delivery at the referred hospital
Yes	6,658	63.6
No	3,810	36.4
Type of delivery^b
Vaginal	2,774	26.5
Cesarean section	7,558	72.2
Skin-to-skin contact or breastfeeding during 1st hour
Yes	8,237	78.7
No	2,098	20.0
Companion during delivery^b
Yes	5,795	55.4
No	4,540	43.4
Rooming-in^b
Yes	9,489	90.7
No	846	8.1
Puerperal or child welfare appointment scheduled^b
Yes	8,650	82.6
No	1,686	16.2

^a Recipients of a monthly allowance.

^b 1.2% of non-response.