Efficacy of Clodronate, Pamidronate, and Zoledronate in Reducing Morbidity and Mortality in Cancer Patients With Bone Metastasis: A Meta-Analysis of Randomized Clinical Trials

Efficacy of Clodronate, Pamidronate, and Zoledronate in Reducing Morbidity and Mortality in Cancer Patients With Bone Metastasis: A Meta-Analysis of Randomized Clinical Trials

Author Machado, Marcio Google Scholar
Cruz, Lorena Souza Google Scholar
Tannus, Gabriela Autor UNIFESP Google Scholar
Fonseca, Marcelo Autor UNIFESP Google Scholar
Institution Univ Toronto
Universidade Federal de São Paulo (UNIFESP)
Abstract Background: Complications from skeletal-related events (SREs) constitute a challenge in the care of patients with metastatic bone disease (MBD) that originated from any type of malignancy.Objective: The purpose of this article was to compare the efficacy of clodronate, pamidronate, and zoledronate with that of placebo in reducing morbidity and overall mortality in cancer patients with MBD.Methods: MEDLINE, Embase, and the Cochrane Central Register of Controlled Trials were searched (from inception to January 2009) to retrieve randomized clinical trials that evaluated the bisphosphonates of interest. The search included articles published in English, French, Italian, Portugese, and Spanish. Patients with a definite (le, biopsy-proven) diagnosis of MBD were included in the analysis. We extracted and combined data from studies that reported the number of patients with SREs and mortality data. A random-effects, meta-analytic model was applied in all calculations. The Jadad scale was used to assess the quality of study reporting.Results: The literature search identified 62 potential full-text studies; 44 of these studies were excluded and 18 were evaluated. The mean (SD) quality of reporting of the included studies was 57.8% (22.6%), or 2.89/5 (1.1/5). Each of the 3 drugs was found to be more effective than placebo in preventing all SREs in cancer patients with MBD. The relative risk of developing SREs was 0.70 (95% CI, 0.61-0.81; N = 1211) for zoledronate, 0.81 (95% CI, 0.73-0.91; N = 2251) for pamidronate, and 0.87 (95% CI, 0.75-1.00; N = 681) for clodronate. However, no clear advantage of one drug over the others was observed (CIs overlapped substantially). None of the bisphosphonates was more beneficial than placebo in reducing the number of deaths in the course of the trials (P = NS).Conclusion: Clodronate, pamidronate, and zoledronate were associated with reductions in morbidity in cancer patients with MBD with regard to preventing SREs, but were not associated with a reduction in overall mortality. (Clin Ther. 2009;31:962-979) (C) 2009 Excerpta Medica Inc.
Keywords bisphosphonates
skeletal-related events
mortality
meta-analysis
Language English
Date 2009-05-01
Published in Clinical Therapeutics. Bridgewater: Elsevier, v. 31, n. 5, p. 962-979, 2009.
ISSN 0149-2918 (Sherpa/Romeo, impact factor)
Publisher Elsevier B.V.
Extent 962-979
Origin http://dx.doi.org/10.1016/j.clinthera.2009.05.009
Access rights Closed access
Type Review
Web of Science ID WOS:000267248000003
URI http://repositorio.unifesp.br/11600/43388

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