Table 2. Model variables evaluated in the nested imaging substudy cohort.
| Characteristic | Cohort (N = 135) | Range | Low exposure (N = 59) | High exposure (N = 76) | F or X2 | P-value |
|---|---|---|---|---|---|---|
| Race: African American1 | 34 (~25%) | 6 (~10%) | 28 (~37%) | 12.54 | 0.0004 | |
| Sex1 | 59 Female (~44%) | 29 Female (~49%) | 30 Female (~39.5%) | 1.26 | 0.2608 | |
| ECAT at birth record address2 | 0.44 (±0.17) | 0.24–0.88 | 0.27 (±0.02) | 0.56 (±0.13) | 286.06 | < 0.0001 |
| ECAT at imaging2 | 0.38 (±0.13) | 0.24–0.83 | 0.30 (±0.06) | 0.44 (±0.14) | 54.20 | < 0.0001 |
| Average ECAT2 | 0.39 (±0.13) | 0.24–0.85 | 0.29 (±0.03) | 0.48 (0.11) | 163.33 | < 0.0001 |
| Child birth weight (pounds)2 | 7.62 (±1.26) | 4.44–10.90 | 7.86 (±1.31) | 7.42 (±1.19) | 4.20 | 0.0423 |
| Child age at imaging (years)2 | 12.12 (±0.75) | 11.0–14.71 | 12.23 (±0.80) | 12.03 (±0.7) | 2.43 | 0.1211 |
| Maternal age (years)2 | 29.7 (±5.7) | 18.34–43.1 | 31.95 (±5.01) | 27.96 (±5.62) | 18.44 | < 0.0001 |
| Child FSIQ2 | 99.32 (±15.9) | 44–139 | 101.9 (±15.33) | 97.3 (±16.13) | 3.91 | 0.097 |
| Maternal IQ2 | 105.11 (±13.28) | 65–145 | 109.24 (±12.02) | 101.91 (±13.39) | 10.87 | 0.0013 |
| Deprivation index at birth2 | 0.45 (±0.19) | 0.18–1.0 | 0.36 (±0.1) | 0.53 (±0.21) | 29.80 | < 0.0001 |
Data presented as mean (± S.D.) or n (%)
F, Χ2, and P-values represent comparison between low and high exposure groups
1 Chi-square test
2 One-way ANOVA