Fig. 4From: Preoperative pain hypersensitivity is associated with axial pain after posterior cervical spinal surgeries in degenerative cervical myelopathy patients: a preliminary resting-state fMRI studya The paired t test for revealing the Amplitude of Low Frequency Fluctuation (ALFF) differences between postoperative axial pain (PAP) group and no postoperative axial pain (nPAP) group in DCM patients. MCC: Middle Cingulate Gyrus. b The null distribution obtained from permutation test and performance of Support Vector Machine (SVM) model using only clinical metrics for PAP vs. nPAP classification. CR: Correct Rate. c The null distribution obtained from permutation test and performance of SVM model using clinical metrics combined with ALFF (i.e., within MCC) for PAP vs. nPAP classification. d Null distribution obtained from the permutation test to determine whether there is a significant difference between two modelsBack to article page