Table 1.
Summary of the parameters for the slow waves, including mean and standard deviation
| Stage | Parameter | Mean | SD | PFA | PAD |
|---|---|---|---|---|---|
| N2 | Slow wave density (SW per minute) | 2.61 | ±0.56 | 0.07 | 0.11 |
| Mean negative peak (μV) | −92.24 | ±5.96 | 0.26 | 0.68 | |
| Mean rising slope (μV/s) | 324.41 | ±31.04 | 0.59 | 0.13 | |
| N3 | Slow wave density (SW per minute) | 11.26 | ±3.77 | 0.27 | 0.11 |
| Mean negative peak (μV) | −87.52 | ±4.23 | 0.56 | 0.93 | |
| Mean rising slope (μV/s) | 357.84 | ±28.05 | 0.14 | 0.006 |
The rightmost columns indicate the corrected p value for the most significant voxel of the correlation between the slow wave parameter (row) and the DTI parameter (column). A significant correlation between AD and the rising slope of slow waves during sleep stage N3 was observed, indicating that axial diffusivity was higher in individuals with a steeper slow wave slope (see Fig. 2).