Table 2.
Within-subject similarity of sigma power topographies across sleep stages and spindle classes.
| Comparison | Correlation | Classification | |||||
|---|---|---|---|---|---|---|---|
| N | R | Pcorr < 0.05 | I ≥ II | II ≥ I | |||
| N2 vs. N3 | Night 1 | Slow | 24 | 0.46 ± 0.37*** | 75% | 42%*** | 46%*** |
| Fast | 26 | 0.78 ± 0.21*** | 96% | 77%*** | 69%*** | ||
| Slow vs. Fast sigma | Night 1 | N2 | 24 | 0.33 ± 0.35*** | 67% | 25%*** | 38%*** |
| N3 | 24 | 0.19 ± 0.35* | 63% | 33%*** | 46%*** | ||
R: Pearson correlation coefficient (mean ± SD, across individuals); Pcorr < 0.05: percentage of subjects with False Discovery Rate-corrected P values < 0.05; I ≥ II and II ≥ I: classification direction. Significance levels (correlation: one-sample t-test vs. zero; classification: binomial test) indicated by * < 0.05; *** < 0.001.