活性安慰剂对照对随机试验中估计的药物效应的影响:一项超流行病学研究
David Ruben Teindl Laursen1, Mihaela Ivosevic Broager1, Mathias Weis Damkjær1
1Cochrane Denmark & Centre for Evidence-Based Medicine Odense (CEBMO), Department of Clinical Research, University of Southern Denmark, Odense, Denmark; Open Patient data Explorative Network (OPEN), Odense University Hospital, Odense, Denmark.
Journal of clinical epidemiology
|September 26, 2025
概括
这项研究发现,在估计药物效益方面,活性安慰剂和标准安慰剂对照剂之间没有显著的平均差异. 然而,显著的异质性表明在临床试验中它们的比较可靠性存在不确定性.
科学领域:
- 临床药理学 临床药理学
- 超流行病学 超流行病学
- 生物统计学 生物统计学
背景情况:
- 随机临床试验 (RCT) 中的失明对于公正的评估至关重要.
- 如果参与者通过副作用检测到他们的治疗分配,可能会发生失明.
- 活性安慰剂模仿药物的副作用,可能减轻揭示偏差.
研究的目的:
- 评估活性安慰剂与标准安慰剂对照对药理学RCT实验干预的估计益处的影响.
- 探索安慰剂对照效应中异质性的原因.
- 评估安慰剂对照类型对估计的伤害,消耗和联合干预使用的影响.
主要方法:
- 一个元流行病学研究分析RCT的元分析,比较活性安慰剂和标准安慰剂对照.
- 用两阶段的元流行病学模型来研究安慰剂对照类型的影响.
- 主要分析的重点是概率比率 (RORs) 的整合比率;次要结果包括伤害,消耗和联合干预使用.
主要成果:
- 包括67篇评论和123个元分析 (1698个试验).
- 综合ROR的益处为0.98 (95%CI为0.77-1.24),表明标准安慰剂对益处的轻微,非显著的平均高估.
- 敏感性和异质性分析没有确定性;二次结果分析不准确.
结论:
- 活性安慰剂与标准安慰剂对照对估计的药物效应没有发现统计学上显著的平均影响.
- 置信区间包括两个方向的重要影响,预测区间显示出相当大的异质性.
- 活性与标准安慰剂对照者的比较可靠性仍然不清楚,在研究中存在无法解释的差异.
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