UFR, unstimulated salivary flow rate; BMS Burning mouth syndrome, SOM Somatization, O-C Obsessive-compulsive, I-S Interpersonal sensitivity, DEP Depression, ANX Anxiety, HOS Hostility, PAR Paranoid ideation, ACTH Adrenocorticotropic hormone, ref reference, CI Confidence interval. This evidence concerns the gene POMC and major depressive disorder.