PAC values at baseline showed significant negative correlations with the PSQI and ISI scores (Figure 4d). The GSC had a stronger PAC and lower PSQI and ISI scores, whereas the ID patients had weaker PAC and higher PSQI and ISI scores. Furthermore, we analyzed the preferred phase of the PAC, which is defined as the phase in which the amplitude distribution is at its maximum. This can be used to determine whether the amplitudes were aligned at a specific phase angle. However, no significant differences in the preferred phase were detected between ID patients and GSC, or before and after active treatment in ID patients (Figures 5c and S4).
