Table 2.
Results from the F-test assessing model fit comparison for N2 and P3 Component.
| Model | Marginal R2 (%) | △Marginal R2 (%) | F (DF) | p-value |
|---|---|---|---|---|
| N2 amplitude | ||||
| Baseline | 5.34 | |||
| + CTT | 6.73 | 1.39 | 2.90 (4, 258) | 0.023 |
| + TrOnset | 9.88 | 3.15 | 1.88 (6, 268) | 0.084 |
| + PTSD | 10.76 | 0.89 | 0.84 (12, 279) | 0.609 |
| N2 latency | ||||
| Baseline | 7.93 | |||
| + CTT | 10.22 | 2.28 | 4.10 (4, 258) | 0.003 |
| + TrOnset | 10.80 | 0.59 | 1.02 (6, 268) | 0.410 |
| + PTSD | 11.46 | 0.65 | 0.68 (12, 279) | 0.768 |
| P3 amplitude | ||||
| Baseline | 3.94 | |||
| + CTT | 6.05 | 2.11 | 4.88 (4, 292) | 0.001 |
| + TrOnset | 8.22 | 2.18 | 2.64 (6, 304) | 0.016 |
| + PTSD | 8.54 | 0.31 | 0.50 (12, 316) | 0.916 |
| P3 latency | ||||
| Baseline | 4.14 | |||
| + CTT | 5.16 | 1.01 | 3.39 (4, 291) | 0.010 |
| + TrOnset | 6.38 | 1.22 | 2.37 (6, 303) | 0.030 |
| + PTSD | 7.85 | 1.47 | 0.65 (12, 313) | 0.802 |
Baseline model: ERP ~ mTBI + Age + Sex + Combat Exposure + Site + Deployment + (1/StudyID/Site), CTT = Cumulative Interpersonal and non-interpersonal Trauma Type (as 2 separate summed variables), TrOnset = Trauma Onset (4gp: Trauma < 10, Trauma 10–17, Trauma 18 + , No Trauma), Post-deployment PTSD = PCL Score (2gp: PCL < 30 Low; PCL > = 30 High), F (DF) = F value (Num DF, Den DF).