Table 1.

Baseline sociodemographic characteristics

	n	%	Mean	SD	Range
Age at pregnancy (years)	178		27.32	5.88	14–44
Parity (number of children)a	178		0.58	0.76	0–4
Parity rate (number of children/year)a	178		0.04	0.06	0–0.37
Energy intake in pregnancy (kcal)	178		1912.80	536.01	859.96–3792.98
Energy intake postpartum (kcal)	178		1797.96	484.67	789.08–3342.58
Education	178		11.03	2.86	2–20
Elementary school	11	6.18
Middle school	56	31.46
High school	83	46.63
Undergraduate and graduate school	28	15.73
SESb	169
A/B	0	0.00
C+	5	2.96
C	22	13.02
D+	52	30.77
D	60	35.50
E	30	17.75
Marital status	178
Living with a partner	159	89.33
Living with no partner	19	10.67
Breastfeeding duration	178
0 months	11	6.18
1–6 months	67	37.64
7–12 months	48	26.97
> 12 months	52	29.21

SD: standard deviation, SES: socioeconomic status.

Note:

^aThe variable parity and parity rate only includes the number of children the woman had 13.42±1.65 years after the index child.

^bA/B is the highest SES category.