Table 1.
Descriptive Data of Analytic Sample at Time 1
| Characteristic | SB (n = 50) M (SD) or % |
TH (n = 60) M (SD) or % |
SB vs. TD |
|---|---|---|---|
| Youth age at Time 1 | 8.34 (0.48) | 8.48 (0.50) | t(106.14 = −1.53 |
| Maternal age at Time 1 | 37.98 (5.46) | 37.68 (4.97) | t(108) = 0.30 |
| Paternal age at Time 1a | 41.08 (5.38) | 40.39 (6.25) | t(83) = 0.54 |
| Gender | |||
| Male | 54.0% | 50.0% | χ2 (1) = 0.18 |
| Female | 46.0% | 50.0% | |
| Child racial background | |||
| Caucasian | 84.0% | 90.0% | χ2 (1) = 0.88 |
| Other | 16.0% | 10.0% | |
| Verbal IQ at Time 1 | 93.14 (17.39) | 109.53 (15.33) | t(108) = −5.25* |
| Hollingshead SES at Time 1b | 42.99 (10.46) | 46.91 (10.85) | t(105) = −1.88 |
Note. The statistically significant difference in Verbal IQ, measured using the Peabody Picture Vocabulary Test–Revised Edition (PPVT-R), was expected due to cognitive difficulties associated with SB.
a
SB (n = 39), TD (n = 46).
b
SB (n = 48), TD (n = 59).
*
p < .001.