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a Manchester
Adult Cystic Fibrosis Unit, South Manchester University Hospitals NHS
Trust, Wythenshawe Hospital, Manchester M23 9LT, UK, b Department of Medicine, University of
Manchester, Manchester Royal Infirmary, Manchester M13 9WL, UK, c Clinical
Radiology, Imaging Science and Biomedical Engineering,
University of Manchester, Manchester M13 9PT, UK
Correspondence to: Professor A K Webb the5webbs{at}hotmail.com
Received 5 June 2000; Returned to authors 3 October 2000; Revised version received 8 November 2000; Accepted for publication 18 December 2000
BACKGROUND
Low
bone mineral density (BMD) is prevalent in adults with cystic fibrosis.
The aim of this study was to assess the effect of intravenous
pamidronate on BMD in these subjects.
METHODS
Patients were
invited to participate if they had a BMD Z score of -2 or less in the
lumbar spine, proximal femur, or distal forearm. Patients were
randomised to receive either 30 mg intravenous pamidronate every 3 months + 1 g calcium daily (pamidronate group) or 1 g calcium daily
(control group). All pancreatic insufficient patients were prescribed
oral vitamin D supplements.
RESULTS
After 6 months
of treatment the pamidronate group (n=13) showed a significant increase
in absolute BMD compared with the control group (n=15) in the lumbar
spine (mean difference 5.8% (CI 2.7% to 8.9%)) and total hip (mean
difference 3.0% (CI 0.3% to 5.6%)). However, the pamidronate group
showed a reduction in BMD compared with the control group in the distal
forearm (mean difference -1.7% (CI -3.7% to 0.3%)). The use of
pamidronate was associated with a high incidence of bone pain in
non-corticosteroid treated individuals.
CONCLUSION
Intravenous
pamidronate increases axial BMD in adults with cystic fibrosis, but the
high incidence of bone pain associated with this treatment might limit
its use.
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