Table 1 Sociodemographic characteristics of Adolescent Brain Cognitive Development (ABCD) Study participants (N = 7,983)

Age (years)

12.02 (0.66)

Sex (%)

    Female

48.2%

    Male

51.8%

Race and ethnicity (%)

    White

58.7%

    Latino / Hispanic

18.2%

    Black

13.7%

    Asian

5.1%

    Native American

3.1%

    Other

1.2%

Household income (%)

    $24,999 or less

14.6%

    $25,000 to $49,999

19.7%

    $50,000 to $74,999

18.0%

    $75,000 to $99,999

14.5%

    $100,000 to $199,999

25.0%

    $200,000 and greater

8.2%

Parent’s highest education (%)

    High school education or less

12.8%

    College education or more

87.2%

Country of origin (%)

    Born in the U.S.

96.5%

    Born outside the U.S.

3.5%

Sexual orientation (%)

    Heterosexual

83.8%

    Gay/bisexual

8.1%

    Maybe gay/bisexual

5.5%

    Don’t understand the question

1.3%

    Decline to answer

1.3%

Depression (%) ^a

2.6%

Conduct disorder (%) ^b

1.3%

Physical abuse during childhood (%)

0.8%

BMI category (%) ^b

    Underweight

3.4%

    Healthy weight

63.0%

    Overweight

16.4%

    Obesity

17.1%

In the past 12 months, have you felt discriminated against because of your: (%)

    Race, ethnicity, or color

4.5%

    Country of origin

1.6%

    Sexual orientation

4.9%

    Weight

4.9%

    Multiple identities (mean (SD))

0.16 (0.50)

Probable OCD (%) ^a

    Year 2

3.1%

    Year 3

3.3%