Document Detail


Hip and spine strength effects of adding versus switching to teriparatide in postmenopausal women with osteoporosis treated with prior alendronate or raloxifene.
MedLine Citation:
PMID:  23281041     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Many postmenopausal women treated with teriparatide for osteoporosis have previously received antiresorptive therapy. In women treated with alendronate (ALN) or raloxifene (RLX), adding versus switching to teriparatide produced different responses in areal bone mineral density (aBMD) and biochemistry; the effects of these approaches on volumetric BMD (vBMD) and bone strength are unknown. In this study, postmenopausal women with osteoporosis receiving ALN 70 mg/week (n = 91) or RLX 60 mg/day (n = 77) for ≥18 months were randomly assigned to add or switch to teriparatide 20 µg/day. Quantitative computed tomography scans were performed at baseline, 6 months, and 18 months to assess changes in vBMD; strength was estimated by nonlinear finite element analysis. A statistical plan specifying analyses was approved before assessments were completed. At the spine, median vBMD and strength increased from baseline in all groups (13.2% to 17.5%, p < 0.01); there were no significant differences between the Add and Switch groups. In the RLX stratum, hip vBMD and strength increased at 6 and 18 months in the Add group but only at 18 months in the Switch group (Strength, Month 18: 2.7% Add group, p < 0.01 and 3.4% Switch group, p < 0.05). In the ALN stratum, hip vBMD increased in the Add but not in the Switch group (0.9% versus -0.5% at 6 months and 2.2% versus 0.0% at 18 months, both p ≤ 0.004 group difference). At 18 months, hip strength increased in the Add group (2.7%, p < 0.01) but not in the Switch group (0%); however, the difference between groups was not significant (p = 0.076). Adding or switching to teriparatide conferred similar benefits on spine strength in postmenopausal women with osteoporosis pretreated with ALN or RLX. Increases in hip strength were more variable. In RLX-treated women, strength increased more quickly in the Add group; in ALN-treated women, a significant increase in strength compared with baseline was seen only in the Add group.
Authors:
Felicia Cosman; Tony M Keaveny; David Kopperdahl; Robert A Wermers; Xiaohai Wan; Kelly D Krohn; John H Krege
Publication Detail:
Type:  Journal Article; Multicenter Study; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research     Volume:  28     ISSN:  1523-4681     ISO Abbreviation:  J. Bone Miner. Res.     Publication Date:  2013 Jun 
Date Detail:
Created Date:  2013-05-22     Completed Date:  2013-12-09     Revised Date:  2014-02-06    
Medline Journal Info:
Nlm Unique ID:  8610640     Medline TA:  J Bone Miner Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1328-36     Citation Subset:  IM    
Copyright Information:
Copyright © 2013 American Society for Bone and Mineral Research.
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MeSH Terms
Descriptor/Qualifier:
Aged
Aged, 80 and over
Alendronate / administration & dosage*
Bone Density / drug effects*
Bone Density Conservation Agents / administration & dosage*
Female
Finite Element Analysis
Hip / physiopathology,  radiography
Humans
Middle Aged
Osteoporosis, Postmenopausal / drug therapy*,  metabolism*,  physiopathology,  radiography
Raloxifene / administration & dosage*
Spine / physiopathology,  radiography
Teriparatide / administration & dosage*
Tomography, X-Ray Computed
Chemical
Reg. No./Substance:
0/Bone Density Conservation Agents; 10T9CSU89I/Teriparatide; X1J18R4W8P/Alendronate; YX9162EO3I/Raloxifene

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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