WITHDRAWN: Risedronate for the prevention and treatment of postmenopausal osteoporosis
Abstract
BACKGROUND: Postmenopausal osteoporosis results in an increased susceptibility to low-trauma fractures due to reduced bone volume and microarchitectural deterioration. Risedronate, a third generation bisphosphonate, has been shown in multiple clinical trials to reduce fracture risk and improve bone mineral density in postmenopausal women with osteoporosis. First and second generation bisphosphonates are known to have gastrointestinal side-effects and risedronate may be better tolerated.
OBJECTIVES: To systematically review the efficacy of risedronate on bone density, and fracture reduction in postmenopausal women.
SEARCH STRATEGY: The Cochrane Controlled Trials Registry Medline, and Current Contents were searched from 1990 - 2001. The electronic search was supplemented by handsearching four osteoporosis journals and their conference proceedings, as well as contacting content experts and industry sources for unpublished data.
SELECTION CRITERIA: We included eight trials that randomised women to risedronate or an alternative (placebo or calcium and /or vitamin D) and measured bone mineral density for at least one year.
DATA COLLECTION AND ANALYSIS: For each trial three independent reviewers assessed the methodological quality and abstracted data. Data was extracted for outcomes of fracture, bone mineral density and adverse events. The more conservative random effects model was used to pool data. The quality of trials was assessed according to the Jadad five-point scale.
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