A descriptive cross-sectional study was conducted on 380 patients aged 60 years and older who came to the clinic for examination and outpatient treatment at the following clinics: Endocrinology, Neuroendocrinology, Cardiology, General Internal Medicine at the Outpatient Department of Tien Giang Central General Hospital during the period from March 2021 to May 2021 in order to evaluate the sleep quality of elderly people undergoing outpatient treatment and describe a number of related factors.