Glucosamine for pain in osteoarthritis: why do trial results differ?

Glucosamine for pain in osteoarthritis: why do trial results differ?
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氨基葡萄糖治疗骨关节炎疼痛:为什么试验结果不同?

DOI:
10.1002/art.22728
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发表时间:
2007
影响因子:
--
通讯作者:
Felson,DavidT
Felson,DavidT
中科院分区:
--
文献类型:
--
作者:
Vlad,StevenC;LaValley,MichaelP;McAlindon,TimothyE;Felson,DavidT

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氨基葡萄糖试验中的研究人员报告了一系列疗效估计,使结论变得困难。我们进行了这项研究,以确定因素,解释试验的异质性glucosamine.MethodsWe搜索报告的试验结果在奥维德Medline,对照试验的科克伦中央注册,系统评价的科克伦数据库,和科学会议的程序。我们选择了葡萄糖胺治疗膝关节或髋关节骨关节炎疼痛的随机、双盲、安慰剂对照试验报告。我们提取了有关设计特征、受试者和行业参与标记的数据,包括行业资助、药物是否由行业提供、行业参与和行业附属作者。我们研究了哪些因素最好的解释这些特征分组的研究的效应大小的差异,我们研究了I2的变化,一个衡量heterogeneous.ResultsFifteen试验符合我们的纳入标准。汇总效应量为0.35(95%置信区间0.14,0.56)。I2为0.80。除了分配隐藏,没有研究设计的特征解释这种实质性异质性。在没有行业参与的试验中,汇总效应量范围为0.05 - 0.16,但在有行业参与的试验中,范围为0.47-0.55。使用氨基葡萄糖盐酸盐的试验的效应量为0.06,使用氨基葡萄糖硫酸盐的试验的效应量为0.44。使用Rottapharm产品的试验有0.55的效果大小,与0.11相比,为rest. ConclusionHeteroadenosine氨基葡萄糖的试验之间是大于预期的机会。盐酸氨基葡萄糖无效。在有行业参与的试验中,效应量始终较高。可能的解释包括不同的葡萄糖胺制剂、分配隐瞒不充分和行业偏见。
ObjectiveInvestigators in trials of glucosamine report a range of estimates for efficacy, making conclusions difficult. We undertook this study to identify factors that explain heterogeneity in trials of glucosamine.MethodsWe searched for reports of trial results in Ovid Medline, the Cochrane Central Register of Controlled Trials, the Cochrane Database of Systematic Reviews, and proceedings of scientific conferences. We selected reports of randomized, double‐blind, placebo‐controlled trials of glucosamine for pain from osteoarthritis of the knee or hip. We extracted data regarding features of design, subjects, and markers of industry involvement, including industry funding, whether a drug was supplied by industry, industry participation, and industry‐affiliated authorship. We examined which factors best accounted for differences in the effect sizes of studies grouped by these characteristics, and we examined changes in I2, a measure of heterogeneity.ResultsFifteen trials met our inclusion criteria. The summary effect size was 0.35 (95% confidence interval 0.14, 0.56). I2was 0.80. Except for allocation concealment, no feature of study design explained this substantial heterogeneity. Summary effect sizes ranged from 0.05 to 0.16 in trials without industry involvement, but the range was 0.47–0.55 in trials with industry involvement. The effect size was 0.06 for trials using glucosamine hydrochloride and 0.44 for trials using glucosamine sulfate. Trials using Rottapharm products had an effect size of 0.55, compared with 0.11 for the rest.ConclusionHeterogeneity among trials of glucosamine is larger than would be expected by chance. Glucosamine hydrochloride is not effective. Among trials with industry involvement, effect sizes were consistently higher. Potential explanations include different glucosamine preparations, inadequate allocation concealment, and industry bias.
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