Table 2.

Comparison of groups: Between‐ and within‐group differences in regional homogeneity

Contrast	Region	BA	Size	t score	Coordinate
					x	y	z
Effect of sciatica (between groups)
HC > Pretreat	NS
Pretreat > HC	PCC	23	450	9.94	−9	−42	30
Effect of treatment
Between groups
Post‐treat > HC	Precentral gyri	4	193	7.66	24	−21	51
HC > Post‐treat	NS
Within groups
Pretreat > Post‐treat	PCC/PCu	23	381	5.21	3	−54	21
Post‐treat > Pretreat	NS

Peak coordinates refer to Montreal Neurological Institute space. Significance was set at the uncorrected voxel level p = .005, followed by the family‐wise error‐corrected cluster level p = .05.

Abbreviations: BA, Brodmann area; HC, healthy control group; NS, nonsignificant; PCC, posterior cingulate cortex; Post‐treat, group with sciatica after an acupuncture treatment; Pretreat, group with sciatica before acupuncture treatment.