Table 2.
Regression models for sample (N = 401) with the five frequency bands as outcome variables. Predictor variables were: control variables, PTSD Symptom clusters, as measured by the PSS-I-5, life events, and two-way interactions. The variables presented were those remaining after data-driven model reduction by the AIC.
| Delta Band Ratio | Theta Band Ratio | Alpha Band Ratio | Beta Band Ratio | Gamma Band Ratio | ||
|---|---|---|---|---|---|---|
| β [bootstrapped CIs] | β [bootstrapped CIs] | β [bootstrapped CIs] | β [bootstrapped CIs] | β [bootstrapped CIs] | ||
| Control Variables | Illness & Medication | −0.096* [−0.194, −0.006] | −0.107* [−0.196, −0.013] | −0.109*[−0.196, −0.019] | – | – |
| Brain Injury | 0.146** [0.062, 0.250] | 0.152** [0.066, 0.244] | 0.126** [0.036, 0.216] | 0.126*[0.027,0.230] | 0.076 [−0.032, 0.200] | |
| PSS-I DSM 5 | B Intrusions | – | – | – | −0.032 [−0.149, 0.080] | −0.008 [−0.116, 0.117] |
| C Avoidance | – | – | 0.054 [−0.086, 0.162] | – | – | |
| D Negative Cognition & Mood | 0.162** [0.053, 0.286] | 0.158**[0.044, 0.272] | 0.125 [0.005, 0.275] | 0.091 [−0.032, 0.198] | – | |
| E Hyperarousal | 0.025 [−0.083, 0.121] | 0.021 [−0.080, 0.123] | −0.005 [-0.120, 0.108] | – | 0.083 [−0.027, 0.188] | |
| Life Events | Trauma Life Events | 0.141* [0.023, 0.256] | −0.090 [−0.213, 0.041] | 0.119* [0.023, 0.219] | 0.135* [0.013, 0.261] | 0.009 [−0.147, 0.137] |
| Aggression Life Events | −0.047 [−0.161, 0.080] | 0.177** [0.055, 0.290] | – | −0.040 [-0.168, 0.084] | 0.026 [−0.085, 0.154] | |
| Childhood Adversity | 0.027 [−0.072, 0.130] | 0.033 [−0.071, 0.124] | 0.012 [−0.091, 0.111] | 0.021 [−0.077, 0.117] | 0.030 [−0.076, 0.138] | |
| Interactions: PSS-I DSM 5*Life Events | Intrusions*Trauma Events | – | – | – | −0.168* [−0.316, −0.034] | −0.183 [−0.393, 0.012] |
| Intrusions*Aggression Events | – | – | – | 0.109 [−0.011, 0.230] | 0.193* [0.012, 0.367] | |
| Avoidance*Trauma Events | – | – | −0.112* [−0.217, −0.004] | – | – | |
| Hyperarousal*Trauma Life Events | – | 0.238*** [0.111, 0.356] | 0.197*** [0.095, 0.298] | 0.240*** [0.130, 0.356] | 0.253** [0.062, 0.427] | |
| Hyperarousal*Aggression Life Events | 0.120** [0.037, 0.205] | – | – | – | −0.165* [−0.300, −0.043] | |
| Hyperarousal*Childhood Adversity | – | – | – | – | −0.091 [−0.208, −0.010] | |
| Negative Cognition & Mood*Trauma Life Events | – | −0.123*[−0.250, 0.007] | – | – | – | |
| Negative Cognition & Mood*Childhood Adversity | −0.156*[−0.277, −0.018] | −0.131* [−0.254, −0.008] | −0.212***[−0.317,−0.107] | −0.179*** [−0.296,−0.093] | – | |
| R2 (Adj-R2) | 9.1% (7.1%) | 10.5% (8.2%) | 9.8% (7.5%) | 9.3% (6.7%) | 5.1% (2.2%) | |
Significant values, as defined by p-value, highlighted in bold.
*
p < 0.05.
**
p < 0.01.
***
p = 0.001.