RESUMO
PURPOSE: This study aimed to find the relationships between quality of sleep, symptoms, depression, and anxiety in patients with colorectal cancer. METHODS: A cross-sectional correlation study was used. Participants were 138 colorectal cancer patients undergoing chemotherapy. Measurements included the self-reported Pittsburgh Sleep Quality Index (PSQI), the Hospital Anxiety Depression Scale (HADS), the M. D. Anderson Symptom Inventory (MDASI-GI) and the patients' medical history. RESULTS: 87.0% of subjects were assessed as poor sleepers. The most severe symptoms reported were feeling bloated, followed by fatigue, and sadness. The prevalence of anxiety and depression were 68.2%, and 77.5% respectively. According to the result of multiple regression analysis, symptoms, depression, cancer severity, and comorbidity of chronic illness were significant predictors of quality of sleep scores (Adj. R²=.392, p<.001). CONCLUSION: The independent variables of symptoms were the major contributing factors to poor sleep quality. Oncology nursing professionals need to assess the symptoms to improve quality of sleep for colorectal cancer patients undergoing chemotherapy.