Table 2.
Parameter estimates (SE)a for the mixed-effects Poisson regression models predicting prospective dimensional ratings of social-communication
| Examiner Ratings | Parent Ratings | |
|---|---|---|
| Estimated trajectory for LR-Non-ASD group | ||
|
| ||
| Baseline (6 months) | 1.247 (0.063)*** | −0.289 (0.150)† |
| Linear change with age (per 6 months) | −0.279 (0.056)*** | −0.659 (0.146)*** |
| Quadratic change with age (per 6 months) | 0.035 (0.010)*** | 0.062 (0.030)* |
|
| ||
| Estimated difference between ASD and LR-Non-ASD groups | ||
|
| ||
| Baseline (6 months) | −0.156 (0.105) | −0.070 (0.262) |
| Linear change with age (per 6 months) | 0.507 (0.086)*** | 0.822 (0.203)*** |
| Quadratic change with age (per 6 months) | −0.065 (0.015)*** | −0.057 (0.039) |
|
| ||
| Estimated difference between HR-Non-ASD and LR-Non-ASD groups | ||
|
| ||
| Baseline (6 months) | −0.065 (0.086) | 0.117 (0.195) |
| Linear change with age (per 6 months) | 0.285 (0.075)*** | −0.032 (0.184) |
| Quadratic change with age (per 6 months) | −0.041 (0.013)** | 0.015 (0.038) |
Note:
*
p < .05,
**
p < .01,
***
p < .001,
†
p < .10.
SE = standard error
a
From mixed-effect Poisson regression models with a log link fitted to the rescaled data with person as a random effect. Ratings on the original scales (ranging from 5–15 for examiners and 3–9 for parents) were rescaled (to 0–10 and 0–6, respectively) by subtracting the scores from the maximum of the corresponding scales, so that zero scores correspond to no deficits in social-communication.