Table 4.
Effect of hypothermia duration on processed electroencephalography-derived parameters during maintenance period.
| EEG variable | Coefficient | Estimated variance of intercept | Estimated variance of duration | ||||
|---|---|---|---|---|---|---|---|
| Coefficient | 95% CI | p-value | Variance | p-value | Variance | p-value | |
| PSI | 5 × 10−4 | −3 × 10−4 to 1.2 × 10−3 | 0.224 | 103.7 | <0.001 | 2.2 × 10−3 | 0.500 |
| SR | −4.1 × 10−5 | −3 × 10−3 to 2.9 × 10−3 | 0.980 | 908.7 | 0.001 | −6.3 × 10−3 | 0.890 |
| SEF, R (Hz) | 2.1 × 10−4 | −3 × 10−5 to 4.4 × 10−4 | 0.077 | 15.2 | 0.001 | 2.0 × 10−6 | 0.996 |
| SEF, L (Hz) | 1.9 × 10−4 | −2.3 × 10−4 to 5.9 × 10−4 | 0.346 | 21.4 | 0.001 | −2.0 × 10−3 | 0.072 |
CI, confidence interval; PSI, patient state index; SEF, R, spectral edge frequency, right cerebral hemisphere; SEF, L, spectral edge frequency, left cerebral hemisphere; SR, suppression ratio.