Osteosarcopenia, osteoarthritis and frailty: a two-sample Mendelian randomization study

Area of Science:

• Gerontology
• Musculoskeletal Health
• Epidemiology

Background:

• Musculoskeletal diseases are prevalent in the elderly and are linked to frailty.
• Frailty is a significant clinical concern in aging populations.

Purpose of the Study:

• To investigate the potential causal relationships between osteosarcopenia, osteoarthritis, and frailty using Mendelian Randomization (MR).

Main Methods:

• A two-sample MR approach was utilized.
• Genome-wide significant summary statistics were used to identify instrumental variables.

Main Results:

• Increased total bone mineral density (TBMD), forearm BMD (FA-BMD), ultradistal forearm BMD (UFA-BMD), and heel-BMD were associated with reduced frailty risk.
• Higher grip strength, appendicular lean mass, and walking pace were protective against frailty.
• Osteoarthritis, specifically knee (KOA) and hip (HOA), showed a causal relationship, increasing frailty risk.

Conclusions:

• Osteosarcopenia and osteoarthritis are significant risk factors for frailty.
• Clinical interventions for patients with osteosarcopenia and osteoarthritis are recommended to mitigate frailty risk.