ArticleJournal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research2026
Contributions of Bone Microarchitecture to Skeletal Fragility in Adults with Longstanding Type 1 Diabetes.
Article in Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Type 1 diabetes mellitus (T1D) is associated with a marked increase in fracture risk, a phenomenon not entirely explained by lower DXA-BMD. Emerging evidence suggests T1D may adversely affect bone microarchitecture, though findings are inconsistent. We aimed to characterize bone microarchitecture and estimated bone strength in adults with longstanding T1D. We enrolled 96 individuals with T1D (median HbA1c 7.0% [IQR 6.3,7.7], mean diabetes duration 46±10 years) and 57 individuals without diabetes, all aged >50 years. Assessments included areal BMD (aBMD) at the lumbar spine, femoral neck, and total hip via DXA, trabecular bone score (TBS), and high-resolution peripheral quantitative computed tomography (HR-pQCT) to evaluate volumetric BMD (vBMD), bone microarchitecture, and estimated failure load at the distal radius and tibia. Individuals with T1D were more likely to report prior history of fracture compared to controls (26% vs 4%, p<0.001). After adjusting for age, sex, height, and weight, aBMD and TBS did not differ between groups. HR-pQCT revealed modest cortical deficits in the T1D group, with largely preserved trabecular microarchitecture and no significant difference in estimated failure load compared to control participants. Within the T1D group, those who reported a prior fracture had lower spine aBMD and lower estimated strength at the tibia. Notably, individuals diagnosed with T1D at or before age 12 years had worse trabecular parameters at the radius than those diagnosed later, with no corresponding differences at the tibia and no differences seen on DXA. Retinopathy was associated with lower aBMD at the hip and femoral neck and with reductions in trabecular thickness, area, failure load, and stiffness at the tibia. The minor differences in bone microarchitecture observed in this study may partly contribute to the increased fracture risk among patients with T1D, though more research examining mediating factors both intrinsic and extrinsic to bone is needed.
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