Correlation between ALFF and pain intensity after intervention
Depression, NRS
The EA‐stimulation difference (EA_ POD 7 vs. POD 3) and group difference (HCs vs. patients at POD 3) as shown by ALFF overlapped in bilateral precuneus, which was chosen as the ROI. Correlation analysis revealed that the change (POD 7–POD 3) in ALFF of bilateral precuneus were negatively correlated with the change of NRS scores (Correlation between the change of ALFF in precuneus with the change of NRS scores and SDS in patients. The change (POD7–POD3) of ALFF in precuneus was negatively correlated with the change of NRS scores and not significantly correlated with the change of SDS in EA group. There was no significant difference between the changed ALFF values of precuneus with the changed NRS scores and SDS. ALFF, amplitude of low‐frequency fluctuation; PCUN, precuneus; NRS, numerical rating scale; SDS, Self‐Rating Depression Scale.