Table 2.
Growth Models for Changes in Social Skills from Age 3 to 13 by Diagnosis at Age 2
| Predictors | Model 1 | Model 2 | Model 3 | Model 4 |
|---|---|---|---|---|
| Coefficient (S.E.) | Coefficient (S.E.) | Coefficient (S.E.) | Coefficient (S.E.) | |
| Fixed Effects | ||||
| Intercept | 13.84*** (.64) | 11.27*** (.89) | 12.48*** (1.39) | 10.46* (2.59) |
| Age at Testing | .43*** (.04) | .31*** (.05) | .38*** (.05) | .70*** (.10) |
| Social Skills at Age 2 | .37* (.18) | .38* (.18) | ||
| Dx at Age 2: | ||||
| Autistic | --- --- | --- --- | --- --- | |
| PDD | 4.10** (1.46) | 1.51 (1.51) | 1.25 (1.52) | |
| Nonspectrum | 6.76*** (1.64) | 1.83 (1.95) | 1.54 (1.96) | |
| Site | ||||
| N.C. ref. for aut. | .50 (1.48) | .86 (1.62) | ||
| N.C. dd | 5.51 (3.03) | 5.65 (3.04) | ||
| Chicago | --- --- | --- --- | ||
| Nonwhite | −.10 (1.46) | −.07 (1.46) | ||
| Mother’s Education | −.17 (.58) | −.04 (.61) | ||
| Nonverbal IQ at Age 2 | .10** (.04) | .10** (.04) | ||
| MPST to Age 5 (> 20 hrs.) | --- --- | |||
| MPST to Age 5 (< 20 hrs.) | 1.87 (2.89) | |||
| MPST to Age 5 (none) | 2.19 (2.23) | |||
| Linear Slopes: | ||||
| Age* Autism | --- --- | --- --- | --- --- | |
| Age* PDD | .21** (.08) | .15* (.07) | .17* (.07) | |
| Age* Nonspectrum | .23** (.08) | .16* (.07) | .18* (.07) | |
| Age* Nonwhite | −.09 (.07) | −.09 (.07) | ||
| Age * Mother’s Education | .02 (.03) | .02 (.03) | ||
| Age* NVIQ | .01***(.00) | .01*** (.00) | ||
| Age* MPST (> 20 hrs.) | --- --- | |||
| Age* MPST (< 20 hrs.) | −.52* (.15) | |||
| Age* MPST (none) | −.35** (.10) | |||
| Variance | Variance | Variance | Variance | |
| Random Effects | ||||
| Slope | .20*** | .18*** | .13*** | .12*** |
N=190
***
p<.001,
**
p<.01,
*
p<.05