Table 5.
(A) The test–retest reliability of EEG features in different epochs from the same EEG. ICC (intra-class correlation). (B) The test–retest reliability of EEG features in multiple EEG recordings taken when the participant was in the same treatment state (either both in the untreated state or both in the treated state)
| (A) Test–retest reliability (between epochs in the same EEG) | ||||
|---|---|---|---|---|
| EEG feature | Spearman’s r | ICC | ||
| All epochs (n = 178) | Equal length epochs (n = 116) | All epochs (95% CI) (n = 178) | Equal length epochs (n = 116) | |
| Delta PSD | 0.90 | 0.90 | 0.91 (0.88–0.93) | 0.91 (0.88–0.94) |
| Low-alpha PSD | 0.90 | 0.92 | 0.91 (0.88–0.93) | 0.93 (0.91–0.95) |
| High-alpha PSD | 0.90 | 0.91 | 0.88 (0.84–0.91) | 0.91 (0.87–0.94) |
| Beta PSD | 0.91 | 0.95 | 0.90 (0.87–0.92) | 0.94 (0.92–0.96) |
| Peak alpha frequency | 0.88 | 0.86 | 0.87 (0.84–0.91) | 0.89 (0.85–0.92) |
| Log10 alpha shift | 0.91 | 0.91 | 0.91 (0.88–0.93) | 0.93 (0.90–0.95) |
| Mean strength | 0.79 | 0.83 | 0.82 (0.76–0.86) | 0.85 (0.79–0.89) |
| Mean strength variance | 0.69 | 0.74 | 0.73 (0.66–0.80) | 0.78 (0.70–0.84) |
| Clustering coefficient | 0.41 | 0.36 | 0.59 (0.48–0.68) | 0.64 (0.52–0.74) |
| Path length | 0.45 | 0.54 | 0.49 (0.38–0.60) | 0.55 (0.41–0.67) |
| Small-world index | 0.44 | 0.44 | 0.55 (0.44–0.64) | 0.58 (0.45–0.69) |
| BNI | 0.76 | 0.81 | 0.78 (0.72–0.83) | 0.81 (0.73–0.86) |
| (B) Test–retest reliability (between multiple EEGs in same treatment state) | ||||
| EEG feature | Spearman’s r | ICC | ||
| All epochs (n = 21) | Equal length epochs ± 5s (n = 13) | All epochs (95% CI) (n = 21) | Equal length epochs ± 5s (n = 13) | |
| Delta PSD | 0.70 | 0.80 | 0.83 (0.57–0.93) | 0.86 (0.54–0.96) |
| Low-alpha PSD | 0.72 | 0.59 | 0.78 (0.48–0.91) | 0.73 (0.09–0.92) |
| High-alpha PSD | 0.34 | 0.45 | 0.51 (−0.24–0.81) | 0.55 (−0.58–0.86) |
| Beta PSD | 0.72 | 0.70 | 0.87 (0.68–0.95) | 0.89 (0.62–0.97) |
| Peak alpha frequency | 0.34 | 0.18 | 0.48 (−0.27–0.79) | 0.36 (−1.34–0.81) |
| Log10 alpha shift | 0.54 | 0.43 | 0.67 (0.22–0.87) | 0.62 (−0.34–0.89) |
| Mean strength | 0.74 | 0.67 | 0.85 (0.65–0.94) | 0.84 (0.51–0.95) |
| Mean strength variance | 0.38 | 0.03 | 0.67 (0.18–0.87) | 0.55 (−0.59–0.86) |
| Clustering coefficient | 0.18 | 0.41 | 0.54 (−0.05–0.81) | 0.86 (0.51–0.96) |
| Path length | 0.42 | 0.42 | 0.78 (0.45–0.91) | 0.77 (0.25–0.93) |
| Small-world index | 0.46 | 0.63 | 0.72 (0.29–0.89) | 0.86 (0.53–0.96) |
| BNI | 0.64 | 0.55 | 0.80 (0.50–0.92) | 0.75 (0.24–0.92) |
BNI = brain network ictogenicity; JME = juvenile myoclonic epilepsy; PSD = power spectral density.