Figure 5
Correlation matrix of variables of interest and GABA/Glu concentration levels in the tinnitus group (n \(=\) 16). Spearman correlations were used. Colored tiles indicate significant correlations (p < 0.05) and correlation strengths are coded in color saturation (positive \(=\) blue, negative \(=\) red). Correlation coefficients are automatically sorted with the built-in hierarchical clustering function of the corrplot package for better navigation of results ( psq Perceived Stress Questionnaire34,35, gaba_r GABA concentration in the right hemisphere ROI, bai Beck Anxiety Inventory37, guef Geräuscheüberempfindlichkeits-Fragebogen41, bdi Beck Depression Inventory36, thi Tinnitus Handicap Inventory39,40, ri_ rating_ l residual inhibition left ear, ri_ rating_ r residual inhibition right ear, hl_ l mean hearing loss left ear, hl_ r mean hearing loss right ear, tin_ loud _ r tinnitus loudness right ear, tin_ loud_ l tinnitus loudness left ear, mml_ l minimal masking level left ear, mml_ r minimal masking level right ear, gaba_ l GABA concentration in the left hemisphere ROI, ldl_ l loudness discomfort level left ear, ldl_ r loudness discomfort level right ear).
