Table 5.
Linear mixed effect models predicting growth in Total Language Composite raw scores from Year 1 and Year 3. Growth estimates (Group × Age interaction coefficients) are relative to the TD reference group. Model 1 = unadjusted, Model 2 = adjusted for individual covariates, Model 3 = Adjusted including interactions between covariate and age
| Model 1 β (95% CI) | Model 2 β (95% CI) | Model 3 β (95% CI) | Model 3 p‐value | |
|---|---|---|---|---|
| Raw Scores Model | ||||
| Age | .3787 (0.362, 0.396) | .379 (0.3620, 0.396) | .375 (0.321, 0.428) | <.001 |
| SDQ | −.708 (−1.242, −0.174) | −.704 (−1.239, −0.170) | .010 | |
| IDACI | .743 (0.251, 1.236) | .743 (0.251, 1.234) | .003 | |
| NVIQ | 2.222 (1.805, 2.638) | 2.223 (1.807, 2.638) | <.001 | |
| Group | ||||
| LD‐only | −10.729 (−11.787, −9.672) | −8.714 (−9.706, −7.723) | −8.713 (−9.704, −7.721) | <.001 |
| LD+plus diagnosis | −17.032 (−19.178, −14.885) | −12.115 (−14.417, −9.813) | −12.113 (−14.414, −9.811) | <.001 |
| Group × age | ||||
| LD‐only | .108 (0.051, 0.1650) | .109 (0.051, 0.166) | .111 (0.050, 0.171) | <.001 |
| LD‐plus diagnosis | .029 (−0.082, 0.140) | .029 (−0.082, 0.140) | .029 (−0.097, 0.154) | .652 |
| SDQ × age | .005 (−0.024, 0.035) | .716 | ||
| IDACI × age | .001 (−0.020, 0.023) | .926 | ||
| NVIQ × age | .002 (−0.017, 0.021) | .832 | ||
| Constant | 43.757 (43.286, 44.228) | 42.606 (41.449, 43.764) | 42.60 (41.451, 43.763) | <.001 |