Assessing Bone Mineral Density Using Radiographs of the Hand: A Multicenter Validation

Area of Science:

• Orthopedics
• Radiology
• Osteoporosis Research

Background:

• Osteoporosis and fragility fractures pose significant health and economic burdens.
• Dual-energy X-ray absorptiometry (DXA) is the current standard for bone density assessment.
• Simpler, accessible methods for osteoporosis diagnosis are needed.

Purpose of the Study:

• To investigate if bone density can be accurately predicted using plain hand radiographs.
• To evaluate the correlation between the second metacarpal cortical percentage (2MCP) and DXA-measured bone density.

Main Methods:

• Retrospective cohort study in two UK centers.
• Calculated 2MCP scores from hand radiographs of 188 patients with distal radius fractures.
• Correlated 2MCP scores with femoral neck t-scores from DXA scans within 12 months.

Main Results:

• The 2MCP score significantly correlated with femoral neck bone density t-scores.
• A 2MCP score <50% showed 100% sensitivity and specificity for osteoporosis.
• A 2MCP score <60% demonstrated high sensitivity (94.4%) and specificity (83.0%) for osteopenia.

Conclusions:

• The 2MCP score is a reliable indicator for determining the likelihood of osteoporosis.
• Plain hand radiographs offer a simpler diagnostic approach for bone density assessment.
• This method could potentially reduce healthcare costs associated with osteoporosis diagnosis.