Sarcopenia and its relationship with osteoarthritis: risk factor or direct consequence?

Area of Science:

• Gerontology
• Orthopedics
• Rheumatology

Background:

• Osteoarthritis (OA) is a degenerative joint disease impacting millions globally.
• Sarcopenia, the age-related loss of muscle mass and strength, is increasingly recognized in older populations.
• The interplay between sarcopenia and OA requires further investigation.

Purpose of the Study:

• To evaluate the clinical significance of sarcopenia in patients with major joint osteoarthritis.
• To synthesize current research on the relationship between sarcopenia and OA.

Main Methods:

• A comprehensive online database search was conducted for studies investigating sarcopenia and OA.
• All relevant peer-reviewed articles in English, French, Spanish, and Italian were considered.
• Five studies, including four prospective and one retrospective cross-sectional study, were included in the final review.

Main Results:

• The review analyzed data from 4,231 patients (mean age 62.0 years), with three studies focusing exclusively on female subjects.
• Body composition metrics like weight, height, and body mass index were consistently reported.
• While some studies indicated a predictive role for lean body mass alterations and a link between radiographic OA and increased leg lean mass, definitive conclusions were limited.

Conclusions:

• Current literature lacks sufficient basic science research to establish a direct causal link between sarcopenia and OA development, or vice versa.
• The absence of standardized clinical measurement tools hinders definitive clarification of the sarcopenia-OA relationship.