To evaluate changes in bone mineral density (BMD) over time and analyze determinants of fracture risk in adults with osteogenesis imperfecta (OI), highlighting the clinical significance of these factors.
Key Findings:
Baseline BMD was low at the lumbar spine (mean Z-score −2.3), particularly in men (mean Z-score −3), indicating a significant risk factor for fractures.
No significant changes in BMD were observed over a median follow-up of 5.1 years, suggesting stability in BMD levels.
Fracture risk was significantly higher with baseline BMD Z-score <−2 SD (odds ratio 4.38) and with specific COL1 gene variants (odds ratio 29.8), indicating a strong genetic component.
Interpretation:
Low BMD at the lumbar spine is prevalent in adults with OI, but it does not change significantly over time. Fracture risk is closely linked to both low BMD and specific genetic mutations, underscoring the need for tailored clinical approaches.
Limitations:
Limited sample size and potential bias due to exclusion of individuals with severe deformities may affect the generalizability of the findings.
BMD may not be a reliable marker of fracture risk in OI compared to other populations, necessitating further investigation.
Conclusion:
The study highlights the importance of genetic factors and baseline BMD in assessing fracture risk in adults with OI, suggesting that both should be considered in future treatment strategies, with a call for further research.
