These included characteristics on multiple levels
of the child's biopsychosocial context: (1) child factors: race / ethnicity (white, black, Hispanic, and Asian / Pacific Islander / Alaska Native), age, gender, 9 - month Bayley Mental and Motor scores, birth weight (normal, moderately low, or very low), parent - rated child health (fair / poor vs good / very good / excellent), and hours per week
in child care; (2) parent factors: maternal age, paternal age, SES (an ECLS - B — derived variable that includes maternal and paternal education, employment status, and income), maternal marital status (married, never married, separated / divorced / widowed), maternal general health (fair / poor versus good / very good / excellent), maternal
depression (assessed by the Center for Epidemiologic Studies Depression Scale at 9 months and the World Mental Health Composite International Diagnostic Interview at 2 years), prenatal use of tobacco and alcohol (any vs none), and violence against the mother; (3) household factors: single - parent household, number of siblings (0, 1, 2, or 3 +), language spoken at home (English vs non-English), neighborhood good for raising kids (excellent / very good, good, or fair / poor), household urbanicity (urban city, urban county, or rural), and modified Home Observation for Measurement of the Environment — Short Form (HOME -
depression (assessed by the Center for Epidemiologic Studies
Depression Scale at 9 months and the World Mental Health Composite International Diagnostic Interview at 2 years), prenatal use of tobacco and alcohol (any vs none), and violence against the mother; (3) household factors: single - parent household, number of siblings (0, 1, 2, or 3 +), language spoken at home (English vs non-English), neighborhood good for raising kids (excellent / very good, good, or fair / poor), household urbanicity (urban city, urban county, or rural), and modified Home Observation for Measurement of the Environment — Short Form (HOME -
Depression Scale at 9 months and the World Mental Health Composite International Diagnostic Interview at 2 years), prenatal use
of tobacco and alcohol (any vs none), and violence against the mother; (3) household factors: single - parent household,
number of siblings (0, 1, 2, or 3 +),
language spoken at home (English vs non-English), neighborhood good for raising kids (excellent / very good, good, or fair / poor), household urbanicity (urban city, urban county, or rural), and modified Home Observation for Measurement
of the Environment — Short Form (HOME - SF) score.