Correlations between ACC choline levels and mood-related psychosocial measures, including a) HADS Depression, b) MPQ affective-to-sensory pain, c) PANAS Negative, and d) recent negative mood (past 24 h) in UCPPS patients. As negative mood and affective pain (relative to sensory pain) scores increased, ACC choline levels increased. Metabolite levels were corrected for age. * indicates that the result survives correction for multiple comparisons (i.e. p < 0.017).