Pagé MG, et al. - This observational longitudinal study was planned to ascertain the prevalence of coexisting chronic pain (CP) conditions, identify the most frequent ones and patterns of coexistence, investigate the relationships among patients’ biopsychosocial characteristics and number of CP conditions, and determine the impact of coexisting CP conditions on treatment response. Researchers observed no specific patterns of comorbidities. The presence of coexisting CP conditions was observed to be associated with longer pain duration, older age, being female, and poorer quality of life. The novelty of the study results could be related to the heterogeneity that was found in the patterns of coexistence of CP conditions and the fact that having multiple CP conditions did not clinically impact treatment response.