Öz Purpose: The purpose of the present study was to evaluate the anxiety-depression and somatization levels of patients scheduled to undergo surgery with the diagnosis of osteoarthritis (OA), which is a chronic and painful disease. Materials and Methods: Patients who were scheduled for surgical intervention with the diagnosis of OA were included in the study as the Study Group, and people who could match the patient group in terms of demographic data were included as the Healthy Control Group. Sociodemographic Data Form, Hospital Anxiety Depression Scale (HADS), Penn State Anxiety Scale (PSAS), and Somatosensory Amplification Scale (SSAS) were applied to all participants. Results: A total of 64 people were included in the present study. The mean age of the patients was 64.77±8.14, and the mean age of the healthy control group was 65.22±9.15. OA patients received higher results compared to the control group in anxiety and depression sub-dimension, and in the total score of HADS. The scores of the patient group were much higher than the healthy controls in PSAS and SSAS. Conclusion: According to the results obtained in the present study, it was determined that the preoperative anxiety-depression and somatization scores of patients diagnosed with OA, which is a chronic and painful disease, were high. Based on these results, it is recommended that OA patients are supported well in psychosocial terms during the course of the disease and before surgical intervention to help them more and to facilitate their compliance to surgery.