関連する実験動画
Updated: Jul 1, 2026

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A Within-Subject Experimental Design using an Object Location Task in Rats
Published on: May 6, 2021
個人を治療する 2. 個人を治療する ランダム化対照試験におけるサブグループ分析:重要性,徴候,解釈
1Stroke Prevention Research Unit, University Department of Clinical Neurology, Radcliffe Infirmary, Oxford OX2 6HE, UK. peter.rothwell@clneuro.ox.ac.uk
Lancet (London, England)
|January 11, 2005
まとめ
大規模な実用的な試験では,治療の有効な適用を確保するために,小グループ分析を慎重に計画する必要があります. 既定で正当化されたサブグループ分析は,信頼性の高い臨床実務の洞察を得るために不可欠です.
科学分野:
- 臨床試験の方法論 臨床試験の方法論
- バイオ統計学 バイオ統計学
- 根拠に基づいた医学は,証拠に基づいた医療です.
背景:
- 大規模な実用的な試験は,信頼性の高い治療効果データを得るために不可欠です.
- 定期的な臨床試験における有効な使用には,適切な試験設計,分析,および報告が必要である.
- サブグループ分析は,特定の患者集団における治療効果を理解するために不可欠です.
研究 の 目的:
- 大規模な実用的な試験におけるサブグループ分析の設計,分析,および報告の原則を概説する.
- サブグループ分析は,誤った情報ではなく,臨床実務と治療決定に情報を提供することを保証します.
- サブグループ分析の計画,分析,報告に関する正式な規則を提案する.
主な方法:
- 臨床試験におけるサブグループ分析の原則のレビュー.
- 前もって定義され,正当化され,制限されたサブグループ質問に重点を置きます.
- 治療効果の異質性を検出するための統計学的考慮事項の議論.
- 試験のパワーの考慮と,予期されるサブグループ効果のためのプール分析.
主要な成果:
- サブグループ分析は,結果や治療効果の潜在的差異がグループ間にある場合に重要です.
- 統計的有意性に関係なく,ポストホック分析は懐疑主義を必要とします.
- 予想される重要なサブグループ効果は,適切な試験力またはプール分析を必要とします.
- 信頼性を高めるために,計画,分析,報告に関する正式な規則が提案されています.
結論:
- 準グループ分析の厳格な計画と正当化が,その妥当な解釈に不可欠である.
- 前もって定義されたサブグループ分析は,日常的な臨床実務における大規模な実用的な試験の有用性を高めます.
- 提案された正式な規則の遵守は,サブグループの発見の品質と信頼性を向上させることができます.
関連する概念動画
Group Design
The most basic experimental design involves two groups: the experimental group and the control group. The two groups are designed to be the same except for one difference— experimental manipulation. The experimental group gets the experimental manipulation—that is, the treatment or variable being tested—and the control group does not. Since experimental manipulation is the only difference between the experimental and control groups, we can be sure that any differences between the two are due to...
Statistical Significance
Once data is collected from both the experimental and the control groups, a statistical analysis is conducted to find out if there are meaningful differences between the two groups. A statistical analysis determines how likely any difference found is due to chance (and thus not meaningful). In psychology, group differences are considered meaningful, or significant, if the odds that these differences occurred by chance alone are 5 percent or less. Stated another way, if we repeated this...
What is an Experiment?
An experiment is a planned activity carried out under controlled conditions. The purpose of an experiment is to investigate the relationship between two variables. When one variable causes change in another, we call the first variable the explanatory or independent variable. The affected variable is called the response or dependent variable. In a randomized experiment, the researcher manipulates values of the explanatory variable and measures the resulting changes in the response variable. The...
Controls in Experiments
When conducting an experiment, it is crucial to have control to reduce bias and accurately measure the dependent variables. It also marks the results more reliable. Controls are elements in an experiment that have the same characteristics as the treatment groups but are not affected by the independent variable. By sorting these data into control and experimental conditions, the relationship between the dependent and independent variables can be drawn. A randomized experiment always includes a...
Randomized Experiments
The randomization process involves assigning study participants randomly to experimental or control groups based on their probability of being equally assigned. Randomization is meant to eliminate selection bias and balance known and unknown confounding factors so that the control group is similar to the treatment group as much as possible. A computer program and a random number generator can be used to assign participants to groups in a way that minimizes bias.
Simple randomization
Simple...
Simple randomization
Simple...
Blinding
Blinding is a commonly used method of not telling participants which treatment a subject is receiving. Blinding is a critical part of a randomized control trial or RCT. It reduces the bias that affects the results. In an RCT, blinding is used in the form of a placebo. A placebo effect occurs when untreated subjects falsely believe they have received the treatment and report improved symptoms. A placebo or a dummy treatment is administered to subjects to negate the bias caused by such an effect.

