Funding for this research was provided by:
American Diabetes Association (7-13-CD-08)
National Institute on Aging (R01AG055681)
European Commission (QLK6-CT-2001-00360, SHARE-I3: RII-CT-2006-062193, COMPARE: CIT5-CT-2005-028857, SHARELIFE: CIT4-CT-2006-028812)
Received: 13 August 2018
Accepted: 15 July 2019
First Online: 27 July 2019
Ethics approval and consent to participate
: The Institutional Review Board of Johns Hopkins University approved the National Health and Aging Trends Study (NHATS). The current study involved secondary data analysis of NHATS data and was approved by the Institutional Review Board of Oregon Health & Science University.
: Not applicable
: The authors declare that they have no competing interests.