Table 1.

Main model variables, assessment tools to determine race/ethnicity, household, sex and age and significance of their contribution to TST as well as ABCD data dictionary search terms

Assessment Tool	Element Name	Variable	P value
ABCD American Community Survey poststratification weights and family relationships measure questionnaire (acspsw03)	race_ethnicity	Race/Ethnicity	< 0.0001
ABCD Parent Demographics Survey (pdem02)	demo_comb_income_v2	Income	0.0001
ABCD Parent Demographics Survey (pdem02)	sex	Sex	0.0001
ABCD Youth Fitbit Daily Sleep Summaries (abcd_fbdss01)	interview_age	Age at interview	< 0.0001
		Race/Ethnicity*Income	0.0031