Table 8.
Linear regression of long-term memory on ΔC—when controlling for sleep habits and fatigue.
| Long-term recall (verbal) | ||||||
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | ||
| A. ANTERIOR COHERENCE | ||||||
| ΔCA | −1.41*** | −1.48*** | −1.26*** | −1.52*** | −1.42*** | −1.49*** |
| (0.36) | (0.39) | (0.33) | (0.37) | (0.34) | (0.44) | |
| Mental fatigue | 0.22 | 0.48** | 0.77* | |||
| (0.49) | (0.33) | (0.40) | ||||
| Reduced motivation | 0.02 | 0.043 | −0.05 | |||
| (0.51) | (0.7) | (0.40) | ||||
| Reduced activity | −0.48* | −0.62*** | −0.68*** | |||
| (0.25) | (0.18) | (0.23) | ||||
| Physical fatigue score | 0.22 | 0.37 | 0.34 | |||
| (0.41) | (0.41) | (0.38) | ||||
| General fatigue score | −0.06 | −0.24 | −0.37 | |||
| (0.31) | (0.47) | (0.27) | ||||
| Epworth sleepiness scale | 0.24 | 0.28** | 0.30** | |||
| (0.15) | (0.13) | (0.13) | ||||
| Hours of sleep | 0.13 | 0.42 | 0.27 | |||
| (0.56) | (0.56) | (0.58) | ||||
| Pittsburgh sleep quality index | 0.26 | 0.51** | 0.42** | |||
| (0.29) | (0.21) | (0.20) | ||||
| Semi-partial R2 for ΔCA | 0.28 | 0.29 | 0.24 | 0.30 | 0.29 | 0.27 |
| B. TOTAL COHERENCE | ||||||
| ΔCT | −1.27*** | −1.22*** | −1.14*** | −1.42*** | −1.27*** | −1.41*** |
| (0.31) | (0.30) | (0.72) | (0.28) | (0.30) | (0.45) | |
| Semi-partial R2 for ΔCT | 0.20 | 0.21 | 0.18 | 0.24 | 0.30 | 0.25 |
| Number of individuals | 35 | 35 | 35 | 35 | 35 | 35 |
Robust standard errors in parentheses.
p < 0.10,
p < 0.05,
p < 0.01.
All specifications include a constant that was omitted from the table.
Linear regression of the long-term memory and difference between monomodal and bimodal coherence (ΔC) when controlling for sleep habits and Multidimensional Fatigue Inventory. In Panel A we investigate the mono-to-bimodal coherence differences in the anterior part of the brain. In Panel B we investigate the mono-to-bimodal coherence differences in the total brain. Each column represents one linear regression model. Control variables were added in a stepwise fashion, showing that the regression between coherence and long-term verbal recall scores was robust enough to account for these factors. Columns 2 and 4 were adjusted for sociodemographic factors (i.e., birth measures and years of education), each of the three cognitive test measures for speed of processing and visual attention, as well as the intelligence score (i.e., I-S-T-2000-R) and working memory using the 15-word pair learning score. The semi-partial R2 for the main explanatory variables are shown along the total adjusted R2.