[en] Osteoporotic post-menopausal women patients in two randomised trials comparing the anti-fracture efficacy of strontium ranelate with placebo were separated into tertiles according to their baseline levels of biochemical markers of bone formation and resorption. The vertebral anti-fracture efficacy of strontium ranelate was shown to be independent of baseline bone turnover levels. INTRODUCTION: Bone turnover (BTO) levels vary among women at risk of osteoporotic fracture. Strontium ranelate is an anti-osteoporotic treatment increasing bone formation and reducing bone resorption. It was hypothesised that its anti-fracture efficacy would be independent of baseline BTO levels. METHODS: Post-menopausal women with osteoporosis from two pooled studies were stratified in tertiles according to baseline levels of two BTO markers: bone-specific alkaline phosphatase (b-ALP, n = 4995) and serum C-telopeptide cross-links (sCTX, n = 4891). Vertebral fracture risk was assessed over 3 years with strontium ranelate 2 g/day or placebo. RESULTS: In the placebo group, relative risk of vertebral fractures increased with BTO tertiles by 32% and 24% for patients in the highest tertile for b-ALP and CTX, respectively, compared to those in the lowest tertile. In the strontium ranelate group, incidences of vertebral fracture did not differ significantly across BTO tertiles. Significant reductions in vertebral fractures with strontium ranelate were seen in all tertiles of both markers, with relative risk reductions of 31% to 47% relative to placebo. Risk reduction did not differ among tertiles (b-ALP: p = 0.513; sCTX: p = 0.290). CONCLUSION: The vertebral anti-fracture efficacy of strontium ranelate was independent of baseline BTO levels. Strontium ranelate offers clinical benefits to women across a wide range of metabolic states.
Disciplines :
General & internal medicine Rheumatology
Author, co-author :
Collette, Julien ; Centre Hospitalier Universitaire de Liège - CHU > Chimie médicale
Bruyère, Olivier ; Université de Liège - ULiège > Département des sciences de la santé publique > Epidémiologie et santé publique
Kaufman, J. M.
Lorenc, R.
Felsenberg, D.
Spector, T. D.
Diaz-Curiel, M.
Boonen, S.
Reginster, Jean-Yves ; Université de Liège - ULiège > Département des sciences de la santé publique > Epidémiologie et santé publique
Language :
English
Title :
Vertebral anti-fracture efficacy of strontium ranelate according to pre-treatment bone turnover.
Publication date :
2010
Journal title :
Osteoporosis International
ISSN :
0937-941X
eISSN :
1433-2965
Publisher :
Springer Science & Business Media B.V., Godalming, United Kingdom
scite shows how a scientific paper has been cited by providing the context of the citation, a classification describing whether it supports, mentions, or contrasts the cited claim, and a label indicating in which section the citation was made.
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