Table 5.
Multiple linear regression analysis of Neurocognitive Index outcome.
| Full Model Beta Coefficient (95% Confidence Interval) |
Reduced Model Beta Coefficient (95% Confidence Interval) |
|
|---|---|---|
| Medicaid insurance | −0.24 (−0.61, 0.13) | −− |
| Pre-injury neurodevelopmental condition | −0.30 (−0.73, 0.13) | −− |
| Word reading (log score) * | 5.73 (3.21, 8.25) | 6.37 (3.89, 8.85) |
| Injury Severity Scale score | ||
| Lowest quartile | Reference | Reference |
| Middle quartiles * | −0.48 (−0.95, −0.004) | −0.59 (−1.05, −0.13) |
| Highest quartile * | −0.48 (−1.03, 0.07) | −0.60 (−1.12, −0.07) |
| Headache weekly or more frequent * | −0.48 (−0.88, −0.07) | −0.53 (−0.93, −0.12) |
| Sleep disturbance present * | −0.32 (−0.69, 0.05) | −0.40 (−0.76, −0.04) |
Backward stepwise regression used for reduced model at p > 0.1 threshold for removal; Final reduced model statistics: F = 12.7, p-value ≤ 0.001; R2 = 0.47; adjusted R2 = 0.44; * p < 0.05 in final model.