Funding for this research was provided by:
Horace H. Rackham School of Graduate Studies, University of Michigan
National Institute on Aging (T32-AG000221)
Received: 22 May 2019
Revised: 2 October 2019
Accepted: 3 October 2019
First Online: 5 November 2019
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: The present study was Internal Review Board exempt, because it involved secondary analysis of publicly available, deidentified data.The MIDUS study, from which the data used in the present study were drawn, performed all study procedures involving human participants in accordance with the ethical standards of the University of Wisconsin Institutional Review Board and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the MIDUS study.