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Related Experiment Video

Updated: Mar 24, 2026

Frailty Assessment in an Aging Mouse Model

Frailty Assessment in an Aging Mouse Model

Published on: September 23, 2025

Associations Between Longitudinal Changes in Frailty and Incident Arthritis: A Multi-Cohort Study.

Zhiyan Han¹, Haiyan Qu², Xinping Wang³

¹School of Healthcare Security, Shandong First Medical University, Jinan, People's Republic of China.

Risk Management and Healthcare Policy

|March 23, 2026

Summary

Higher baseline frailty and worsening frailty status significantly increase arthritis risk in older adults. Improving frailty did not reduce arthritis risk, highlighting the importance of preventing frailty progression.

Keywords:

arthritis cohort study frailty longitudinal study risk factors

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Area of Science:

Gerontology and Public Health
Epidemiology of Chronic Diseases

Background:

Frailty is a significant predictor of adverse health outcomes in older adults.
Understanding the dynamic relationship between frailty and incident arthritis is crucial for targeted interventions.

Purpose of the Study:

To investigate the association between baseline frailty, longitudinal changes in frailty status, and the risk of developing arthritis.
To analyze these associations across diverse international populations.

Main Methods:

Analysis of harmonized longitudinal data from four large international ageing cohorts (CHARLS, ELSA, SHARE, MHAS).
Inclusion of 48,480 participants aged 45+ for baseline analysis and 18,820 for longitudinal frailty change analysis.
Utilized a standardized frailty index and Cox proportional hazards models, adjusting for covariates.

Main Results:

Higher baseline frailty was prospectively associated with increased incident arthritis risk (HRs 1.26-1.71).
Worsening frailty status (pre-frail to frail) significantly elevated arthritis risk (HRs 1.45-2.06).
Improvement in frailty status did not significantly reduce arthritis risk across cohorts.

Conclusions:

The association between frailty and arthritis risk is asymmetric; frailty progression elevates risk, but improvement does not readily reverse it.
Preventing frailty decline is more effective for mitigating arthritis risk than attempting to reverse established vulnerability.