Informal Helping and Subsequent Health and Well-Being in Older U.S. Adults.

"Declarations Ethical ApprovalAll procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This study was exempt from review by the Institutional Review Board at the University of British Columbia because data were publicly available and de-identified. Informed ConsentInformed consent was obtained by the Health and Retirement Study from all individual participants included in the study. Conflicts of InterestTyler J. VanderWeele reports receiving personal fees from Flerish Inc. and Flourishing Metrics. Julia S. Nakamura, Matthew T. Lee, and Eric S. Kim have no competing interests to declare that are relevant to the content of this article. Conflicts of Interest Tyler J. VanderWeele reports receiving personal fees from Flerish Inc. and Flourishing Metrics. Julia S. Nakamura, Matthew T. Lee, and Eric S. Kim have no competing interests to declare that are relevant to the content of this article."

"Funding This work was supported by the Michael Smith Foundation for Health Research and the Vanier Canada Graduate Scholarships (Vanier CGS) program. Both funders had no role in the design and conduct of the study; the collection, management, analysis, or interpretation of the data; the preparation, review, or approval of the manuscript; and the decision to submit the manuscript for publication."