Table 1 Spearman’s correlation coefficients between variables of interest

Parental migration status (1)

1.000

County (2)

−0.186^a

1.000

Child sex (3)

0.024

−0.022

1.000

Child age (4)

0.299^a

−0.001

−0.020

1.000

Low birthweight (5)

−0.009

0.015

0.012

0.045

Caregiver ethnic (6)

−0.030

0.210^a

0.040

−0.033

Caregiver sex (7)

0.222^a

−0.137^a

0.036

0.157^a

Caregiver age (8)

0.825^a

−0.106^a

0.011

0.316^a

Caregiver education (9)

−0.567^a

0.087^b

0.053

−0.156^a