OUTLINE: Patients undergo an empirical examination of illness perceptions as predictors of disease, specifically from the five domains in the Common Sense Model. Patients undergo an assessment of the relationship between influencing characteristics (i.e., sociodemographic), symptoms, and behavioral factors (i.e., illness perceptions, overall symptom distress, and quality of life). Patients complete questionnaires to evaluate demographics by the Sociodemographic, Disease, and Health Status Tool; illness perception by the Illness Perception Questionnaire-Revised (IPQ-R); symptoms and symptom distress by the Memorial Symptom Assessment Scale (MSAS) and Brief Pain Inventory; and quality of life by the SF-12. Patients also undergo a medical chart review and self-report on sociodemographic characteristics.