Funding for this research was provided by:
Innovation committee of shenzhen science and technology (KJYY20170413162318686)
The Fundamental Research Funds for the Central Universities, Huazhong University of Science and Technology, Wuhan, China (2016YXMS215)
The China Postdoctoral Science Foundation funded project (2018M630870)
Received: 11 July 2019
Accepted: 21 October 2019
First Online: 11 November 2019
Ethics approval and consent to participate
: The present study was based on an analysis of secondary data from the China National Stroke Screening and Prevention Project database. Permission to use the data was granted by the same institution. This study was conducted in accordance with the principles of the Declaration of Helsinki and approved by the institutional review board of Xuanwu Hospital Capital Medical University Beijing, China.
: Not applicable.
: The authors declare that they have no competing interests.