Table 3.
Model results for stable risk factor variables for TBI and OI models. Bolded items indicate statistically significant predictors of class membership.
| TBI Models | |||||
|---|---|---|---|---|---|
|
| |||||
| Group | Parameter | Estimate | Standard Error | t | p |
| Normal Limits | Constant | - | - | - | - |
|
| |||||
| Clinically Elevated | age at injury | 0.81 | .42 | 1.94 | .054 |
| sex | .64 | .83 | .77 | .443 | |
| ses | -.32 | .44 | -.72 | .474 | |
| injury severity | -1.45 | .85 | -1.71 | .087 | |
| Baseline GEC | .13 | .04 | 2.98 | .003 | |
|
| |||||
| OI Models | |||||
|
| |||||
| Group | Parameter | Estimate | Standard Error | t | p |
|
| |||||
| Normal Limits | Constant | - | - | - | - |
|
| |||||
| Subclinical | Age at injury | -.31 | .53 | -.58 | .56 |
| Sex | -1.11 | 1.24 | -.89 | .37 | |
| SES | -.25 | .57 | -.44 | .66 | |
| Baseline GEC | .53 | .20 | 2.63 | <.01 | |
|
| |||||
| Clinically Elevated | Age at injury | -.20 | .61 | -.33 | .74 |
| Sex | -2.06 | 1.41 | -1.47 | .14 | |
| SES | -.25 | .67 | -.37 | .71 | |
| Baseline GEC | .69 | .21 | 3.33 | <.001 | |
Note: Injury severity was modeled categorically (moderate vs. severe TBI). Significant positive parameter estimates indicate more/greater instances of a variable in that trajectory group compared to the comparison (normal limits) group, whereas negative parameter estimates indicate fewer/less instances of that variable in the trajectory group compared to the comparison (normal limits) group. GEC = Behavior Rating Inventory of Executive Function General Executive Composite