Table 3.
Parameter Estimates from Growth Curve Model
| Parameter | Estimates | t value | p value |
|---|---|---|---|
| Component 1—Speed Processing | |||
| Intercept | 0.4828 | 1.99 | 0.0487 |
| OI vs. mTBI | −1.0690 | −2.65 | 0.0097 |
| Age at injury | −.02079 | −2.09 | 0.0403 |
| Age at injury*Group (OI vs. mTBI) | .05793 | 3.31 | 0.0014 |
| SCI | .2660 | 3.32 | 0.0014 |
| Interval (slope) | .01327 | 10.85 | <0.0001 |
| Interval2 (quadratic) | −.00017 | −7.03 | <0.0001 |
| Component 2—Visual Memory | |||
| Intercept | 1.0500 | 5.46 | <0.0001 |
| OI vs. mTBI | .06925 | .57 | 0.5688 |
| Age at injury | −.05143 | −6.77 | <0.0001 |
| Interval (slope) | .003086 | 3.93 | 0.0001 |
| Component 3—Verbal Memory | |||
| Intercept | −.1023 | −1.21 | 0.2289 |
| OI vs. mTBI | .1854 | 1.53 | 0.1300 |
| SCI | .1888 | 2.51 | 0.0141 |
| Interval (slope) | .000489 | .49 | 0.6227 |
| Component 3—PTSD Symptoms | |||
| Intercept | .2282 | 2.37 | 0.0187 |
| OI vs. mTBI | −.7330 | −5.74 | <0.0001 |
| Gender (F vs. M) | .4692 | 3.36 | 0.0012 |
| Interval (Slope) | −.00385 | −4.24 | <0.0001 |
| Interval*group (OI vs. mTBI) | .00295 | 2.19 | 0.0316 |