Table 1.
Sample characteristics at study entry by group
| HR-ASD-High | HR-ASD-Mod | HR-Neg | LR-Neg | p a | |||||
|---|---|---|---|---|---|---|---|---|---|
| (n = 31) | (n = 18) | (n = 161) | (n = 98) | (4-Group) | |||||
| n | % | n | % | n | % | n | % | ||
| Gender | <0.01 | ||||||||
| Male | 26 | 83.9 | 15 | 83.3 | 88 | 54.7 | 55 | 56.1 | |
| Female | 5 | 16.1 | 3 | 16.7 | 73 | 45.3 | 43 | 43.9 | |
| Ethnicity | 0.97 | ||||||||
| White | 27 | 87.1 | 15 | 83.3 | 140 | 87.0 | 84 | 85.7 | |
| Non-white | 4 | 12.9 | 3 | 16.7 | 21 | 13.0 | 14 | 14.3 | |
| Family income | 0.83 | ||||||||
| Not answered | 0 | 0.0 | 1 | 5.6 | 6 | 3.7 | 4 | 4.1 | |
| <$75,000/year | 12 | 38.7 | 8 | 44.4 | 65 | 40.4 | 41 | 41.8 | |
| > = $75,000/year | 19 | 61.3 | 9 | 50.0 | 90 | 55.9 | 53 | 54.1 | |
| Maternal education | 0.02 | ||||||||
| No college | 12 | 38.7 | 8 | 44.4 | 48 | 29.8 | 19 | 19.4 | |
| College degree | 10 | 32.3 | 5 | 27.8 | 75 | 46.6 | 37 | 37.8 | |
| Graduate degree | 9 | 29.0 | 5 | 27.8 | 38 | 23.6 | 42 | 42.9 | |
| Mean | Std | Mean | Std | Mean | Std | Mean | Std | ||
| Child gestational age (week) | 38.6 | 1.42 | 39.1 | 1.17 | 39.0 | 1.24 | 39.2 | 1.42 | 0.41 |
| Age at visits (month) | |||||||||
| 6 month visit | 6.8 | 0.82 | 6.6 | 0.64 | 6.8 | 0.76 | 6.7 | 0.71 | 0.67 |
| 12 month visit | 13.1 | 0.88 | 12.8 | 0.68 | 12.9 | 0.75 | 12.9 | 0.76 | 0.59 |
| 24 month visit | 24.5 | 0.80 | 25.1 | 2.19 | 25.1 | 3.08 | 25.5 | 3.1 | 0.30 |
| ADOS total score at 24 months | 17.4 | 3.53 | 11.0 | 2.00 | 2.6 | 2.06 | 2.33 | 2.0 | <0.0001 |
aFisher’s exact test for categorical variables (gender, family income, maternal education) and ANOVA for continuous variables (gestational age and age at visits). All tests are two-sided at a significance level of .05