TABLE 1.
Demographic information of the participants from the ABCD dataset included in the present study
| Characteristic | Baseline | One‐year follow‐up |
|---|---|---|
| N (%) or mean (SD) | N (%) or mean (SD) | |
| Age (months) | 119.3 (7.5) | 131.4 (7.8) |
| Sex at birth | ||
| Female | 4,674 (50.0%) | 4,412 (49.9%) |
| Male | 4,676 (50.0%) | 4,433 (50.1%) |
| Race | ||
| White | 6,101 (65.3%) | 5,872 (66.4%) |
| Black | 1,340 (14.3%) | 1,198 (13.5%) |
| Other (mixes or Asians) | 1909 (20.4%) | 1775 (20.1%) |
| Pubertal status | 1.8 (0.9) a | 2.1 (1.0) b |
| Mental problems | 45.4 (11.2) | 45.0 (11.0) c |
| MP ≥ 67 (clinical threshold) | 2,468 (26.4%) | 2,166 (24.5%) |
| Total sleep disturbance | 36.3 (8.0) | 36.5 (7.9) d |
| TSD ≥ 52 (clinical threshold) | 463 (5.0%) | 474 (5.4%) |
| Total cognitive composite score | 48.3 (11.1) e | N/A f |
| Number of children | 9,350 | 8,845 |
Abbreviations: MP, mental problems; TSD, total sleep disturbance.
a
Three hundred and five children have missing values.
b
Three thousand and ninety children have missing values.
c
Thirty‐three children have missing values.
d
Twenty‐eight children have missing values.
e
Seven hundred and fifty‐two children have missing values.
f
Total cognitive composite score did not have 1‐year follow‐up data.