Objective: The aim of this study was to assess bone mineral density (BMD) using dual-energy X-ray absorptiometry (DXA) in a group of patients with ankylosing spondylitis (AS) and the factors which have an impact on bone mass. Also, a subgroup of patients not treated with anti-osteoporotic or disease-modifying anti-rheumatic drugs was followed for 24 months to assess potential influencing factors on BMD changes. Subjects and Methods: Fifty-five patients (42 males, 13 females) with AS were enrolled in the study. Clinical examinations were performed. BMD was measured using DXA at lumbar spine (L2–L4) and proximal femur (femur neck BMD and total femur BMD). Lumbar spine radiographs were scored using the Stoke Ankylosing Spondylitis Spine Score (SASSS). Twenty-one of 55 patients who completed 24 months of follow-up without using the aforementioned medications were reassessed. Results: Active patients (Bath Ankylosing Spondylitis Disease Activity Index >4, n = 22) had significantly lower femur neck and total BMD compared to inactive patients (n = 33), whereas spinal BMD was not different. Follow-up data revealed a 3.4% increase in spinal BMD but 0.9% and 0.25% decreases in femur neck BMD and total femur BMD, respectively. Percent changes in BMD measurements and SASSS scores were not significantly different between active (n = 10) and inactive (n = 11) patients. Conclusion: Significant increase in spinal BMD in parallel with increased SASSS revealed that spinal involvement prominent with new bone formation, sclerosis and syndesmophytes may influence spinal BMD measurements using DXA methods in AS. Proximal femur measurements seem to be less affected from disease-related new bone formation.

This content is only available via PDF.
Copyright / Drug Dosage / Disclaimer
Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher.
Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug.
Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.
You do not currently have access to this content.