[en] This article aims to establish a "profile" of patients presenting with chronic pain in the algology service of CHU of Liège to identify possible relationships between diagnoses, psychological states and modes of pain management. Between 2005 and 2010 we monitored 1832 individual chronic pain patients who attended our pain clinic at the University Hospital of Liège. This paper presents the characteristics of these patients and their test scores before the treatment to assess their health status in a biopsychosocial perspective. Demographic and lifestyle as well as occupational factors, pain disability index, pain belief assessment, hospital anxiety and depression scale, SF-36 (Short Form Health Survey) and pain visual analogue scale are presented. The results have clinical implication; they suggest an adaptation of our therapeutic interventions based on these observations. © 2014 Springer-Verlag France.