Table 1.
Descriptive Characteristics of Participants in the Adolescent Brain Cognitive Development (ABCD) Study, May 2020, (n = 6,749)
| Mean (SD) or % (n)* | |
|---|---|
| Demographic characteristics | |
| Age | 12.5 (0.9) |
| Sex | |
| Female | 48.8% (3,247) |
| Male | 51.2% (3,502) |
| Race and ethnicity | |
| White | 59.9% (4,013) |
| Latino / Hispanic | 17.4% (1,018) |
| Black | 12.1% (976) |
| Asian | 6.4% (484) |
| Native American | 2.7% (200) |
| Other | 1.3% (58) |
| Household income | |
| Less than $75,000 | 48.4% (2,028) |
| $75,000 and greater | 51.6% (4,4082) |
| Parents’ highest education | |
| High school education or less | 13.4% (752) |
| College education or more | 86.6% (5,986) |
| COVID-19 related variables | |
| School closure | |
| Yes physically closed | 97.4% (6,481) |
| No | 2.6% (139) |
| Child diagnosed with COVID-19 | |
| Yes | 0.6% (46) |
| No | 99.4% (6,695) |
| Loss of household income due to COVID-19 | |
| Yes | 49.2% (3,199) |
| No | 50.8% (3,504) |
| Self-reported ACE score | |
| 0 | 18.4% (1,291) |
| 1 | 32.4% (2,320) |
| 2 | 26.4% (1,789) |
| 3 | 14.1% (895) |
| ≥ 4 | 8.7% (454) |
| Lifestyle Behaviors | |
| Screen time | 7.9 (6.6) |
| Hours per week of physical activity | 4.6 (6.5) |
| Days completing at least 60 min of exercise in the past week | 3.5 (2.3) |
Propensity weights from the Adolescent Brain Cognitive Development Study were applied based on the 2018 American Community Survey from the US Census
⁎
Reported n's do not correspond with % because propensity weights were applied, and each participant has a sample weighting