Impact of Quality of Life in the Patients With Sleep Disturbance From Low Anterior Resection Syndrome in Advanced Rectal Cancer Patients

"The ISI score is a self-report questionnaire consisting of 7 items designed to assess the nature, severity, and impact of insomnia.(16) The typical recall period for respondents is the last month. The evaluated dimensions include the severity of sleep onset, sleep maintenance, and early morning awakening problems, as well as sleep dissatisfaction, interference of sleep difficulties with daytime functioning, noticeability of sleep problems by others, and the distress caused by the sleep difficulties."