Table 3.
Parameter estimates from the growth curve model
| Parameter | Estimates | t-value | p-value |
|---|---|---|---|
| Intercept | 9.8731 | 3.26 | .0014 |
| Group (OI vs. TBI) | .3547 | .10 | .9226 |
| Race (AA vs other) | 3.1634 | 1.37 | .1722 |
| Race (Caucasian vs other) | 4.6859 | 2.46 | .0138 |
| Block (1 vs 2) | −7.3611 | −4.49 | <.0001 |
| Block (2 vs 3) | −8.1944 | −5.00 | <.0001 |
| Block (3 vs 4) | 0.8796 | .54 | .5913 |
| Block (3 vs 5) | 3.2455 | 1.98 | .0478 |
| Block (4 vs 5) | 2.3658 | 1.44 | .1490 |
| Age | −.6901 | −1.09 | .2760 |
| Gender (F vs M) | −2.6698 | −.68 | .4942 |
| Group*Gender (OI & F vs other) | 4.3421 | .74 | .4617 |
| Age*Group (OI vs TBI) | 2.9932 | 2.82 | .0048 |
| Interval (slope) | −1.0503 | −2.27 | .0254 |
| Interval*age | −.04273 | −.89 | .3724 |
| Interval*Group (OI vs TBI) | 1.4844 | 2.34 | .0192 |
| Interval*Age*Group (OI vs TBI) | .02876 | .39 | .6996 |
| Interval*Gender (F vs M) | 1.7263 | 2.31 | .0209 |
| Interval*group*Gender (OI & F vs other) | −2.4097 | −2.25 | .0244 |
| Interval2 (quadratic) | −.0530 | −1.77 | .0770 |
| Interval2*Age | .0093 | 1.44 | .195 |
| Interval2*Group (OI vs TBI) | .0742 | 1.88 | .0606 |
| Interval2* Age*Group (OI vs TBI) | −.0294 | −2.83 | .0047 |
| Interval2*Gender (F vs M) | .08374 | 1.89 | .0583 |
| Interval2*Group*Gender (OI & F vs other) | −.1211 | −1.90 | .0577 |
| Interval3 (cubic) | .009988 | 2.75 | .0060 |
| Interval3 *Group (OI vs TBI) | −.01048 | −2.14 | .0328 |
| Interval3*Gender (F vs M) | −.01402 | −2.32 | .0205 |
| Interval3 Group*Gender (OI & F vs other) | .01732 | 2.05 | .0407 |