Fig. 2From: Brain SPECT perfusion and PET metabolism as discordant biomarkers in major depressive disorderScatter plot of Spearman’s correlations on extracted clusters. The increased number of depressive episodes is correlated with decreased perfusion of: a the right insula (rho = − 0.58, p = 0.01), b the right anterior cingulate cortex (ACC) (rho = − 0.49, p = 0.02), c the left precuneus (rho = − 0.50, p = 0.02), d the right medial temporal cortex (rho = − 0.84, p = 0.00002) and e the right middle frontal cortex (rho = − 0.49, p = 0.02). This correlation is not significant with the metabolism of: a the right insula (rho = − 0.23, p = 0.40), b the right ACC (rho = − 0.21, p = 0.20), c the left precuneus (rho = 0.20, p = 0.77), d the right medial temporal cortex (rho = − 0.23, p = 0.20) and e the right middle frontal cortex (rho = 0.16, p = 0.55). f The increased depression duration is correlated with decreased perfusion of the right ACC (rho = − 0.61, p = 0.01). This correlation is not significant with the metabolism of the right ACC (rho = 0.08, p = 0.76)Back to article page