Associations between bone mineral density and abdominal aortic calcification: Results of a nationwide survey

Background and aims: Vascular calcification has been linked to bone mineral density (BMD).This study aimed to investigate the association between BMD and abdominal aortic calcification (AAC).Methods and results : Data from the 2013-2014 National Health and Nutrition Examination Survey (NHANES) were utilized.Participants lacking BMD and AAC score data were excluded.BMD at the femoral neck was measured using dual-energy X-ray absorptiometry.AAC scores were assessed using the Kauppila scoring system, with AAC defined as a score greater than zero, and severe AAC defined as a score greater than six.Weighted multivariable regression analysis and subgroup analysis were conducted to examine the independent relationship between BMD and AAC score, AAC, and severe AAC.A total of 2965 participants were included.After adjusting for multiple covariates, BMD showed a negative association with higher AAC scores (β = -0.17,95% CI -0.29, -0.05, p = 0.0066).The odds of having AAC and severe AAC decreased by 9% and 16%, respectively, for every one-unit increase in BMD (AAC: odds ratio [OR] = 0.91, 95% CI 0.82, 1.00, p = 0.0431; severe AAC: OR = 0.84, 95% CI 0.71, 0.99, p = 0.0334). Conclusion:Low BMD is associated with higher AAC scores and an increased risk of AAC and severe AAC.Considering the detrimental impact of low BMD on cardiovascular health, individuals with AAC should be evaluated for osteopenia and osteoporosis in clinical settings.