Abstract: Objective To investigate the prevalence and influencing factors of heart failure （HF） among people aged ≥ 50 years in Xi'an community, and to provide reference for the prevention and control of HF. Methods Stratified random sampling method was used to select the people aged ≥ 50 years from 8 communities in Xi'an as the research object for questionnaire survey, physical examination, biochemical index detection and HF diagnosis. Descriptive epidemiological analysis method was used to analyze the prevalence of HF, and univariate and multivariate analysis methods were used to analyze the influencing factors of HF. Results The age of 3 615 subjects ranged from 50 to 92 years, with an average age of （62.3 ± 8.7） years. There were 1 334 patients with hypertension, accounting for 36.9%, 560 patients with diabetes, accounting for 15.5%, 436 patients with coronary heart disease, accounting for 12.1%, 985 patients with hyperlipidemia, accounting for 27.2%, and 763 patients with a family history of HF, accounting for 21.1%. There were 172 cases of HF, the prevalence rate was 4.76%. Multivariate Logistic regression analysis showed that smoking （OR=3.804）, hypertension （OR=6.924）, diabetes （OR=4.003）, coronary heart disease （OR=8.240）, and hyperlipidemia （OR=1.844） were risk factors for HF among people aged ≥ 50 years in Xi'an community. Physical exercise （OR=0.670） was a protective factor for HF among people aged ≥ 50 years in Xi'an community. Conclusion The prevalence of HF in people aged ≥ 50 years in Xi'an is roughly the same as that in other cities. There are many risk factors affecting the occurrence of HF in this population. Effectively controlling cardiovascular diseases such as coronary heart disease, hyperlipidemia, hypertension and bad living habits can theoretically reduce the incidence of HF in people aged ≥ 50 years.

Key words: Middle-aged and elderly, Heart failure, Prevalence rate, Influencing factor