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Lower spinal bone density tied to faster cognitive decline. A new longitudinal study of 700+ older adults found that lower vertebral bone mineral density (vBMD) in the thoracic spine is linked to faster cognitive decline and greater loss of brain white matter integrity over ~5 years. The connection was especially pronounced in people with diabetes. Researchers used AI to extract bone density data from routine chest CT scans, opening a novel window into brain aging.
A new longitudinal study published in Radiology found that lower bone density in the thoracic spine is associated with faster cognitive decline and accelerating brain white matter changes in older adults — even after accounting for cardiovascular risk factors, physical activity, age, and other confounders. Researchers used a deep learning model to extract vertebral bone mineral density (vBMD) from routine chest CT scans in over 700 adults (median age 69), following them for approximately 5 years.
The findings suggest that spinal bone density may act as an "integrative marker" of cumulative systemic health — reflecting lifelong inflammation, metabolic dysfunction, and frailty — rather than directly causing brain aging. The bone-brain link was strongest in participants with diabetes, where lower vBMD was tied to faster accumulation of white matter hyperintensities in the corpus callosum.
By the Numbers
Why it matters: This study highlights AI's potential to unlock hidden health signals from routine imaging. If validated across scanners and clinical settings, CT-derived vBMD could become a low-cost, opportunistic biomarker for identifying older adults at risk of accelerated brain aging.
