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The distribution of the frailty index among different arthritis patients and the association between the frailty index and mortality in rheumatoid arthritis patients among U.S. adults (results from NHANES 1999–2018)

Crossref DOI link: https://doi.org/10.1007/s40520-025-03091-8

Published Online: 2025-06-11

Update policy: https://doi.org/10.1007/springer_crossmark_policy

Authors

Tang, Shi-Chao

Jin, Lei

Hu, Yong-Qi

Peng, Jun-Feng

Wang, Yan-Qing

Shao, Chong

Liu, Yu
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Text and Data Mining valid from 2025-06-11

Version of Record valid from 2025-06-11
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Article History

Received: 5 October 2024

Accepted: 28 May 2025

First Online: 11 June 2025

Declarations

:

: The authors declare no competing interests.

: The NCHS research ethics review board approved the NHANES study protocol, and participants provided written informed consent at enrollment. The review board of Tongren Hospital, Shanghai Jiao Tong University School of Medicine determined the study to be exempt because it used publicly available de-identified data, and the patient had already signed informed consent upon enrollment. The present study followed the Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) reporting guideline.

: None declared.

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