Table A1.

First Principal Component Scoring Coefficients of the SES Index

	Scoring Coefficients
Household Income	0.61
Mother’s completed years of education
12	−1.23
13	−0.61
14	−0.23
15	0.02
16	0.41
17	0.99
Child insurance status/type
Private insurance	0.17
Medicaid/CHIP	−0.81
Other	−1.30
Total variance explained by 1st principal component (%)	66.8

Note: The table shows the SES index scoring coefficients from the first principal component. Positive and negative coefficients indicate increases and decreases in SES, respectively. The index is estimated for cases with complete data on the index and outcome variables.