[Association between red blood cell volume distribution width and osteophytes: A cross-sectional study]

Area of Science:

• Orthopedics
• Hematology
• Epidemiology

Background:

• Osteophytes, bony growths, are a hallmark of osteoarthritis and can cause joint pain and stiffness.
• Red blood cell volume distribution width (RDW) is a measure of the variation in red blood cell size, often associated with inflammation and anemia.

Purpose of the Study:

• To examine the relationship between red blood cell volume distribution width (RDW) and the incidence of osteophytes.
• To determine if elevated RDW levels correlate with a higher risk of developing knee osteophytes.

Main Methods:

• A cross-sectional study involving 8,334 subjects.
• Osteophyte severity was assessed using OARSI criteria, with incidence defined as grade ≥1.
• Multivariate logistic regression analyzed the association between RDW quartiles and osteophyte incidence, calculating odds ratios (OR) and 95% confidence intervals (CI).

Main Results:

• A positive linear trend was observed between increasing RDW levels and the risk of knee osteophyte incidence (P=0.019).
• Individuals in the second, third, and fourth RDW quartiles showed increased odds of osteophyte prevalence compared to the lowest quartile.
• Specifically, multivariable adjusted ORs (95%CI) for osteophyte prevalence were 1.38 (1.06–1.79), 1.27 (0.97–1.66), and 1.50 (1.15–1.94) for Q2, Q3, and Q4, respectively.

Conclusions:

• The study indicates a significant positive association between higher red blood cell volume distribution width (RDW) and the risk of osteophyte incidence.
• Increasing RDW levels correlate with an elevated risk of developing knee osteophytes, suggesting RDW as a potential biomarker.