Table 1.
Socio-demographic and exposure characteristics of subjects (n=276)a
| Variable | Mean | SD | range |
|---|---|---|---|
| Cord blood PAH-DNA adducts (% detectable) | 43.8 | ||
| PAH Metabolites at Age 5 [% > median]b | 47.0 | ||
| Sex (% female) | 53.6 | ||
| Maternal ETS (% reporting smoker in the home) | 33.3 | ||
| WISC Full Scale | 98.6 | 13.2 | (48, 133) |
| WISC Verbal Comprehension | 96.3 | 12.2 | (45, 134) |
| WISC Processing Speed | 101.1 | 15.2 | (62, 138) |
| WISC Perceptual Reasoning | 100.8 | 14.3 | (63, 137) |
| WISC Working Memory | 97.4 | 14.2 | (54, 135) |
| Maternal education (% ≥ high school education) | 63.4 | ||
| Ethnicity (% AA) | 38.0 | ||
| Maternal IQ (TONI) | 20.7 | 8.7 | (0, 43) |
| Prenatal hardship (% ≥1 hardships) | 42.8 | ||
| Recurrent up to 5 years (% ≥ 1 hardship, 50% of the time) | 39.9 | ||
| HOME inventory | 39.8 | 6.0 | (22, 52) |
a
Subjects have data on cord adducts and IQ test results at age 7.
b
Variable dichotomized at the median level for the entire population (8223.41 ng/m3)