Correlation between distal radial cortical thickness and bone mineral density

Area of Science:

• Orthopedics
• Radiology
• Bone Densitometry

Background:

• Distal radius fractures are common in postmenopausal women.
• Assessing bone health is crucial for fracture management and osteoporosis screening.

Purpose of the Study:

• To evaluate the reliability of measuring distal radius cortical thickness from radiographs.
• To investigate the correlation between distal radius cortical thickness and bone density measurements from dual-energy x-ray absorptiometry (DXA).

Main Methods:

• Orthopedic surgeons measured radial bicortical width on wrist radiographs of 80 women over 50 with distal radius fractures.
• Measurements were correlated with femoral and lumbar spine bone density data from DXA scans.
• Inter-rater reliability was assessed using intra-class correlation coefficients.

Main Results:

• High inter-rater reliability (ICC=0.91) was found for measuring average bicortical thickness.
• A statistically significant positive correlation was observed between distal radius bicortical thickness and femoral bone density.
• No significant association was found between distal radius bicortical thickness and lumbar spine bone density.

Conclusions:

• Distal radius cortical thickness is a reliable radiographic measure and correlates positively with hip bone density.
• This finding suggests potential similarities in bone quality between the appendicular radius and femur.
• Identifying thinned distal radial cortices may prompt further DXA evaluation for bone insufficiency.