Table 1.
Characteristics of cross-sectional sample compared with non-selected participants.
| Variables | BRIEF Analytical Sample |
BRIEF Non-Selected Participants |
CTRS-R:S Analytical Sample |
CTRS-R:S Non-Selected Participants |
||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Covariates | Statistic | n | Statistic | n | Standard Difference | n | n | Standard Difference | ||
| % Male | 55.1% | 448 | 49.0% | 237 | phi = 0.06 | 53.9% | 362 | 52.0% | 323 | phi = 0.02 |
| Age in Months, Mean (SD) | 81.7 (6.08) ** | 448 | 83.2 (6.02) | 236 | d = 0.25 | 81.4 (6.18) *** | 362 | 83.1 (5.88) | 322 | d = 0.28 |
| Maternal Education in Years, Mean (SD) | 8.6 (2.52) | 442 | 8.2 (2.40) | 228 | d = 0.16 | 8.7 (2.49) ** | 356 | 8.2 (2.47) | 314 | d = 0.20 |
| Number of Possessions of Wealth, Mean (SD) | 2.9 (1.34) * | 427 | 2.7 (1.26) | 223 | d = 0.15 | 3.0 (1.36) * | 341 | 2.7 (1.27) | 309 | d = 0.23 |
| HOME Inventory Score, Mean (SD) | 41.7 (9.31) ** | 379 | 38.9 (11.15) | 201 | d = 0.27 | 42.1 (8.88) *** | 298 | 39.3 (11.02) | 282 | d = 0.28 |
| Mother Employed (% Yes) | 62.7% | 394 | 57.6% | 203 | phi = 0.05 | 64.6% | 316 | 56.9% | 281 | phi = 0.08 |
| Either Caregiver Smokes (% Yes) | 60.2% | 425 | 63.9% | 227 | phi = 0.04 | 58.1% | 339 | 65.2% | 313 | phi = 0.07 |
| Hemoglobin (g/dL), Mean (SD) | 13.2 (0.95) | 447 | 13.2 (0.88) | 234 | d = 0.00 | 13.2 (1.00) | 360 | 13.2 (0.86) | 321 | d = 0.0 |
| Body Mass Index, Mean (SD) | 16.8 (2.66) | 444 | 16.8 (2.60) | 234 | d = 0.00 | 16.7 (2.54) | 360 | 16.9 (2.75) | 318 | d = 0.08 |
| Population in Census Segment, Mean (SD) | 2240.5 (1412.2) | 448 | 2097.4 (1412.2) | 237 | d = 0.10 | 2282.2 (1132.2) * | 362 | 2088.7 (1339.6) | 323 | d = 0.16 |
| Primary Exposure | ||||||||||
| % Blood Lead ≥ 2 µg/dL | 52.0% | 448 | 44.7% | 237 | phi = 0.07 | 60.2%*** | 362 | 37.5% | 323 | phi = 0.23 |
| Effect Modifiers | ||||||||||
| Neighborhood Dis., Mean (SD) | 1.66 (1.19) *** | 448 | 1.10 (0.93) | 237 | d = 0.52 | 1.64 (1.19) *** | 362 | 1.28 (1.04) | 323 | d = 0.32 |
| Nearest Greenspace (km), Mean (SD) | 0.22 (0.19) *** | 448 | 0.29 (0.22) | 237 | d = 0.34 | 0.21 (0.20) *** | 362 | 0.27 (0.21) | 323 | d = 0.29 |
| NDVI 150 Meter Buffer, Mean (SD) | 0.34 (0.08) | 448 | 0.33 (0.08) | 237 | d = 0.0 | 0.34 (0.08) * | 362 | 0.32 (0.08) | 323 | d = 0.25 |
| Outcome | ||||||||||
| BREIF Inhibitory Control Problems, Mean (SD) | 56.8 (14.88) | 448 | - | - | - | - | - | |||
| BRIEF Planning/Org. Problems, Mean (SD) | 52.7 (12.04) | 448 | - | - | - | - | - | |||
| CTRS-R:S Oppositional Behavior, Mean (SD) | - | - | - | 53.4 (13.10) | - | - | ||||
| CTRS-R:S Cognitive Problems, Mean (SD) | - | - | - | 54.0 (12.81) | - | - | ||||
| CTRS-R:S Hyperactivity, Mean (SD) | - | - | - | 53.8 (12.28) | - | - | ||||
| CTRS-R:S ADHD Index, Mean (SD) | - | - | - | 54.1 (11.79) | - | - | ||||
Note. Analytical samples pulled from final n of 685 cross-sectional participants that fulfilled inclusion criterion. Row n’s may not sum to 685 due to missing data. Org.—organizing; Dis—disadvantage; µg/dL—micrograms per deciliter; SD—standard deviation; d = Cohen’s d; phi = phi coefficient; n = sample size * p < 0.05; ** p < 0.01; *** p < 0.001.