Postnatal Growth Patterns in a Chilean Cohort: The Role of SES and Family Environment

Table 2

Descriptive statistics of Chilean infants (𝑛=999)¹.

Birth weight (kg)^2	3.5 (0.4)
Birth length (cm)^2	50.6 (1.7)
Gestational age	39.4 (1.0)
Age at infancy evaluation	11.5 (0.4)
Weight-for-age percentile at 1 year^2	48.7 (27.1)
Average weight gain (grams/month)	539.2 (84.2)
Length-for-age percentile at 1 year^2	47.8 (25.8)
Average length gain (cm/month)	6.5 (0.3)
Bottle supplementation at 6 weeks	25.0
Still breastfeeding at 6 months	49.3
Number of siblings	2.1 (1.1)
Iron deficiency anemia in infancy	15.2
Iron supplemented	78.5
Maternal risk for depression	45.7
Life stress	4.8 (2.7)
Physical environment^3	2.8 (1.3)
Maternal warmth^3	3.4 (0.8)
Sibling participation^3	3.9 (1.7)
Gender^2
Male	52.6
Female	47.4
SES
Middle SES	52.7
Low SES	47.3
Adult-to-child ratio
One-to-one ratio	26.4
More adults	15.1
More children	58.5

¹Values are mean (SD) or %.
²Variable not included in the final model.
³Derived from HOME.