Table 2.
The instantaneous frequencies in IMF1 to IMF6 at the first and last time points of the three phases
| [Hz] | ||||||
|---|---|---|---|---|---|---|
| IMF No. | Induction | Maintenance | Emergence | |||
| First time point | Last time point | First time point | Last time point | First time point | Last time point | |
| IMF1 | 25.4(23.9, 27.2) | 13.1(11.2,14.0)*** | 13.3(11.4, 15.4) | 13.4(12.2, 15.1) | 14.3(12.0, 16.2) | 27.2(24.9, 27.9)*** |
| IMF2 | 16.2(14.1, 17.1) | 10.3(9.0, 11.5)*** | 10.2(9.4, 11.2) | 9.9(9.0, 11.4) | 10.8(9.9, 12.2) | 19.0(17.1, 20.1)*** |
| IMF3 | 11.3(9.5, 12.8) | 7.9(7.2, 9.0)*** | 8.2(7.0, 9.3) | 8.4(7.6, 9.1) | 8.7(7.4, 9.2) | 13.6(12.3, 15.1)*** |
| IMF4 | 7.9(6.2, 9.6) | 6.0(4.8, 7.3)* | 6.7(4.4, 7.7) | 6.9(5.7, 8.1) | 6.9(5.2, 8.0) | 10.4(9.3, 11.5)*** |
| IMF5 | 6.5(2.6, 8.1) | 5.2(3.8, 6.1) | 4.9(3.0, 6.3) | 5.3(3.2, 6.2) | 5.7(3.0, 7.5) | 7.8(5.9, 8.7)** |
| IMF6 | 5.6(2.8, 7.6) | 3.6(1.8, 5.5)* | 2.6(1.3, 4.7) | 4.4(2.5, 5.7) | 4.3(2.8, 5.2) | 7.1(5.2, 8.0)*** |
Data are expressed as median (interquartile range). *: p < 0.05; **: p < 0.01; ***: p < 0.001