Table 1.
Sample characteristics by familial risk status for ASD.
| Low-Risk (n=162) |
High-Risk (n=253) |
p-valuea | |
|---|---|---|---|
| Male sex (n, %) | 97 (59.88%) | 131 (51.78%) | 0.11 |
| Ethnicity (n, % non-white)b | 39 (24.07%) | 112 (44.62%) | <0.001 |
| Household income (n, % over $100,000)c | 81 (54.73%) | 128 (54.70%) | 0.99 |
| Maternal education (n, % college degree or higher)d | 125 (80.13%) | 171 (71.25%) | 0.05 |
| Mullen Scales of Early Learninge | |||
| Nonverbal Composite (mean, SD) | 56.90 (9.62) | 55.44 (11.41) | 0.18 |
| Verbal Composite (mean, SD) | 54.47 (7.14) | 51.25 (8.93) | <0.001 |
a
p-values from chi-square (for categorical variables) and independent samples t-tests (for continuous variables).
b
Missing/decline to state n=2 for High-Risk.
c
Missing/decline to state n=14 for Low-Risk and n=19 for High-Risk.
d
Missing/decline to state n=6 for Low-Risk and n=13 for High-Risk.
e
Scores at 36 months of age. Nonverbal Composite=Average of Visual Reception and Fine Motor subscale T-scores; missing n=5 for Low-Risk and n=4 for High-Risk. Verbal Composite=Average of Receptive Language and Expressive Language subscale T-scores; missing n=5 for Low-Risk and n=6 for High-Risk.