Association Between Chronic Psychological Stress and Disease Course Outcomes in Pancreatic Cancer

Inclusion Criteria: * Age ≥ 18 years. * Histologically or cytologically confirmed diagnosis of pancreatic cancer, or other pancreatic diseases. * Conscious, with basic reading/writing or communication skills, able to understand and complete the questionnaire assessments (either independently, with assistance from research staff, or with help from a family member). * Voluntarily agree to participate in this study and sign a written informed consent form. Exclusion Criteria: * Presence of severe cognitive impairment (e.g., dementia, disturbance of consciousness) or a definite history of psychiatric disorders, judged by the investigator as unable to comply with the study assessments, and without a family member who can help complete the questionnaire assessments. * Presence of other severe, uncontrolled systemic diseases (e.g., severe heart, lung, or kidney failure), with an estimated life expectancy \< 3 months as judged by the investigator. * Inability to understand Chinese or presence of severe visual/hearing impairment that affects completion of the questionnaire assessments, and without a family member who can help complete the questionnaire assessments.