1. administer the Low Anterior Resection Syndrome (LARS) questionnaire to patients who underwent low anterior resection surgery for progressive rectal cancer and completed anticancer treatment, with a time lapse of approximately 1 month to 5 years.
2. investigate the use of medication or conservative treatment for managing symptoms of Low Anterior Resection Syndrome.
3. assess whether the symptoms captured in the Low Anterior Resection Syndrome questionnaire primarily occur during the day or night by surveying each of the 5 items in the questionnaire. We determine the overall symptom score by adding up the scores for daytime and nighttime symptoms, selecting the higher score.
4. conduct a survey on the quality of sleep.
5. conduct a survey on the quality of life. compiled the results of the questionnaires and analyze the correlations among them.
