Fig. 2
Associations between gray matter volume and pain severity/interference. Group-stratified results are shown for bivariate associations between mean C5 – C7 ventral and dorsal horn gray matter volume, average pain severity, and average pain interference. Correlations between ventral horn gray matter volume (GMV) and pain severity and interference are represented in Panels A and B, respectively. Correlations between dorsal horn GMV and pain severity and interference are represented in Panels C and D, respectively. FMO individuals with fibromyalgia taking opioids; FMN individuals with fibromyalgia not taking opioids, Rs Spearman’s correlation coefficient. Statistical significance threshold set at p < 0.05. Lines representing the correlation trends that met this threshold are solid and bold.
