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01-10-2017 | Original Article

Bone mineral density in adults with Down syndrome

Authors: A. Carfì, R. Liperoti, D. Fusco, S. Giovannini, V. Brandi, D. L. Vetrano, E. Meloni, D. Mascia, E. R. Villani, E. Manes Gravina, R. Bernabei, G. Onder

Published in: Osteoporosis International | Issue 10/2017

Abstract

Summary

This study analyzed data of bone mineral density (BMD) from a large cohort of adults with Down syndrome (DS). BMD was found to decrease with age more rapidly in these subjects than in the general population, exposing adults with DS to an increased risk of osteoporosis and bone fracture.

Introduction

Down syndrome (DS) in adulthood presents with a high prevalence of osteoporosis. However, in DS, bone mineral density (BMD) can be underestimated due to short stature. Furthermore, the rate of age-related decline in BMD and its association with gender in DS has been rarely evaluated or compared with the general population. The present study is aimed at assessing the variation of BMD with age and gender in a sample of adults with DS and to compare these data with those of the general population, after adjusting for anthropometric differences.

Methods

Adults with DS, aged 18 or older, were assessed dual-energy-X-ray-absorptiometry (DXA) at the femoral neck and at the lumbar spine. They were compared with the general population enrolled in the National Health and Nutrition Examination Survey (NHANES) 2009–2010 dataset. Bone mineral apparent density (BMAD) was calculated for each individual.

Results

DXA was evaluated in 234 subjects with DS (mean age 36.93 ± 11.83 years, ranging from 20 to 69 years; 50.4% females). In the lumbar spine both mean BMD (DS 0.880 ± 0.141 vs. NHANES 1.062 ± 0.167, p < 0.001) and BMAD (DS 0.138 ± 0.020 vs. NHANES 0.152 ± 0.020, p < 0.001) were significantly lower in the DS sample than in the NAHNES cohort. The same trend was observed at the femoral neck in both BMD (DS 0.658 ± 0.128 vs. NHANES 0.835 ± 0.137, p < 0.001) and BMAD (DS 0.151 ± 0.030 vs. NHANES 0.159 ± 0.028, p<0.001). Age was associated with lower femoral neck BMAD in both samples; importantly, this association was significantly stronger in the DS sample. In the lumbar spine region, no significant association between BMAD and age could be observed in both samples.

Conclusions

Adults with DS have lower bone mineral density compared to the general population and they experience a steeper decline with age. Early screening programs are needed in DS population.

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Title: Bone mineral density in adults with Down syndrome
Authors: A. Carfì
R. Liperoti
D. Fusco
S. Giovannini
V. Brandi
D. L. Vetrano
E. Meloni
D. Mascia
E. R. Villani
E. Manes Gravina
R. Bernabei
G. Onder
Publication date: 01-10-2017
Publisher: Springer London
Published in: Osteoporosis International / Issue 10/2017
Print ISSN: 0937-941X
Electronic ISSN: 1433-2965
DOI: https://doi.org/10.1007/s00198-017-4133-x

At a glance: The STEP trials

Springer Medicine

Bone mineral density in adults with Down syndrome

Abstract

Summary

Introduction

Methods

Results

Conclusions

At a glance: The STEP trials

Springer Medicine

Abstract

Summary

Introduction

Methods

Results

Conclusions

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