What question did this study set out to answer?

The aim is to assess long-term trends and inequalities in the burden of osteoarthritis from 1990 to 2021.

Temporal Trends and Cross‐Country Inequalities in the Burden of Osteoarthritis, 1990–2021: Findings From the Global Burden of Disease Study 2021

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Assesses long-term trends in osteoarthritis burden across countries, highlighting inequalities and population factors.

The aim is to assess long-term trends and inequalities in the burden of osteoarthritis from 1990 to 2021.
Data on osteoarthritis incidence and prevalence extracted from the Global Burden of Diseases Study 2021
Slope index and concentration index calculated to quantify inequalities
Joinpoint regression and decomposition analysis applied to measure trends and contributions of population factors
Over 600 million people had osteoarthritis globally in 2021, increasing by 137.03% since 1990.
The slope index of inequality for all-age prevalence increased from 5759.73 to 11151.93 from 1990 to 2021.
Population growth was the largest contributor to the increase in osteoarthritis burden.

Chen et al. (2026) studied this question.

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