Table 1.
Descriptive statistics of the CCAAPS cohort (mean ± SD unless otherwise noted)
| Included | Excluded | ||
|---|---|---|---|
| N | 263 | 81 | |
| Female | 122 (46%) | 31 (38%) | |
| Maternal education | (N = 71) | ||
| High school or less | 50 (19%) | 22 (31%) | |
| Some college | 77 (29%) | 17 (24%) | |
| College/graduate school | 136 (52%) | 32 (45%) | |
| Greenspace (NDVI: [−1 to 1]) | 0.54 ± 0.08 | 0.55 ± 0.09 | |
| Deprivation index [0 to 1] | 0.41 ± 0.15 | 0.42 ± 0.16 | (N = 80) |
| ECAT (μg/m3) | 0.37 ± 0.10 | 0.39 ± 0.11 | |
| Blood lead (μg/dL) | 0.57 ± 0.37 | 0.53 ± 0.32 | (N = 37) |
| Monthly air lead (ng/m3), median (IQR) | 0.51 (0.56) | 0.53 (0.59) | (N = 55) |
| BASC-2 scores | |||
| Anxiety | 52.1 ± 11.6 | 51.6 ± 12.1 | |
| Depression | 49.6 ± 9.9 | 50.4 ± 9.9 | |
| Somatization | 49.6 ± 11.2 | 48.8 ± 12.3 | |
| Aggression | 49.5 ± 8.7 | 48.1 ± 8.2 | |
| Conduct problems | 49.3 ± 8.8 | 48.0 ± 9.7 | |
| Hyperactivity | 50.7 ± 9.8 | 50.9 ± 11.0 | |
| Attention problems | 52.5 ± 9.8 | 52.5 ± 10.6 | |
| Atypicality | 50.0 ± 9.7 | 50.0 ± 9.6 | |
| Withdrawal | 50.0 ± 10.8 | 49.7 ± 11.4 |
For categorical variables, percent of the total is displayed. For numeric variables, the values presented are the mean ± SD, unless otherwise noted. If covariate information was missing for children in the excluded group, the number of excluded children with available covariate information is noted to the right of each summary statistic. None of the averages for any covariates statistically differed for included and excluded participants.