AbstractAlthough it is generally accepted that pain clinics are efficacious, we seek to evaluate the outcome of medical treatments given in a large outpatient pain clinic in terms of clinically relevant change. Treatments include drug therapy, nerve blockade, surgery, nerve stimulation and relaxation. Pain intensity, disability, depression and anxiety are measured at presentation and discharge. The psychometric questionnaires used are: Oswestry Disability Inventory (GDI), Modified Zung Self-rating Depression Scale (m-ZSDS), Speilberger StateTrait Anxiety Inventory (STAI-S), and McGill Pain Questionnaire (MPQ-PRI-T). Pain intensity is also measured using a visual analogue scale (VAS). 2348 patients entered the study. A sub-group of 739 patients (36.4%) treated to discharge, were analysed for outcome. 24.6% (n = 525) of these patients have a 50% or greater fall in pain severity scores. Comparisons of group means indicate that pain severity and disability are reduced after treatment but depression and anxiet...