2.1 Patients
This study screened 43 inpatients with unstable angina from the Department of Geriatric Cardiology, the First Affiliated Hospital of Guangxi Medical University from May 1 , 2019 to December 1, 2019,The age of included patients was between 39 and 64 years, with a mean age of 51.54 ± 12.70 years.