Fractional anisotropy | Radial diffusivity | Axial diffusivity | ||||
---|---|---|---|---|---|---|
Variables | r | p | r | p | r | p |
Insomnia duration, yr | −0.218 | 0.33 | 0.142 | 0.53 | −0.217 | 0.33 |
Epworth Sleepiness Scale score | −0.318 | 0.15 | 0.437 | 0.042 | 0.017 | 0.94 |
Insomnia Severity Index score | 0.254 | 0.25 | −0.183 | 0.41 | 0.210 | 0.35 |
Dysfunctional Beliefs and Attitudes About Sleep score | 0.186 | 0.41 | −0.238 | 0.29 | −0.067 | 0.77 |
Pittsburgh Sleep Quality Index score | 0.279 | 0.21 | −0.261 | 0.24 | 0.167 | 0.46 |
Beck Depression Inventory (non-sleep score)* | 0.018 | 0.94 | −0.037 | 0.87 | −0.028 | 0.90 |
Neuropsychological test data | ||||||
SOC, problems solved in minimal moves | 0.451 | 0.034 | −0.348 | 0.11 | 0.355 | 0.11 |
Polysomnographic data | ||||||
Total sleep time, min | −0.046 | 0.84 | −0.056 | 0.80 | −0.115 | 0.61 |
Sleep efficiency, % | −0.237 | 0.29 | 0.280 | 0.21 | −0.006 | 0.98 |
SOC = Stockings of Cambridge from the Cambridge Neuropsychological Test Automated Battery.
Statistical analyses were performed using Pearson’s r correlation.
↵* Beck Depression Inventory (non-sleep score): excluding the sleep item (16) from the total Beck Depression Inventory 21-item score.