Preoperative insomnia and its association with psychological factors, pain and anxiety in Chinese colorectal cancer patients

Purpose Sleep disturbances are common in cancer patients, but little is known about preoperative insomnia and its associated factors in colorectal cancer (CRC) patients. The aim of this study was to clarify the relationship between preoperative insomnia and its associated factors (i.e., pain, anxiety, self-esteem, and coping styles) in CRC patients.