Funding for this research was provided by:
Hunan Women's Research Association (2018029)
Received: 21 September 2020
Accepted: 14 June 2021
First Online: 29 June 2021
: This is a secondary analysis using the publicly available National Health Aging Trends Study. The analyses were deemed exempt from review by the Johns Hopkins Medicine IRB. All participants provided written informed consent. The public database is available to any registered researchers.
: Not applicable.
: The authors declare that they have no competing interests.