中国老年人失能情况及影响因素研究
张小宁,陈爽
Prevalence and Associated Factors of Disability in Elders Living in China 
ZHANG Xiaoning,CHEN Shuang
中国全科医学 . 2019, (31): 3841 -3844 .  DOI: 10.12114/j.issn.1007-9572.2019.00.508