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相关概念视频

Propagation of Uncertainty from Random Error00:59

Propagation of Uncertainty from Random Error

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An experiment often consists of more than a single step. In this case, measurements at each step give rise to uncertainty. Because the measurements occur in successive steps, the uncertainty in one step necessarily contributes to that in the subsequent step. As we perform statistical analysis on these types of experiments, we must learn to account for the propagation of uncertainty from one step to the next. The propagation of uncertainty depends on the type of arithmetic operation performed on...
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Decision Making: P-value Method01:09

Decision Making: P-value Method

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The process of hypothesis testing based on the P-value method includes calculating the P- value using the sample data and interpreting it.
First, a specific claim about the population parameter is proposed. The claim is based on the research question and is stated in a simple form. Further, an opposing statement to the claim  is also stated. These statements can act as null and alternative hypotheses:  a null hypothesis would be a neutral statement while the alternative hypothesis can...
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Randomized Experiments01:13

Randomized Experiments

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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
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Random Error01:04

Random Error

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Random or indeterminate errors originate from various uncontrollable variables, such as variations in environmental conditions, instrument imperfections, or the inherent variability of the phenomena being measured. Usually, these errors cannot be predicted, estimated, or characterized because their direction and magnitude often vary in magnitude and direction even during consecutive measurements. As a result, they are difficult to eliminate. However, the aggregate effect of these errors can be...
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Uncertainty in Measurement: Accuracy and Precision03:37

Uncertainty in Measurement: Accuracy and Precision

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Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy of their results. Measurements are said to be precise if they yield very similar results when repeated in the same manner. A measurement is considered accurate if it yields a result that is very close to the true or the accepted value. Precise values agree with each other; accurate values agree with a true value. 
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Decision Making: Traditional Method01:14

Decision Making: Traditional Method

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The process of hypothesis testing based on the traditional method includes calculating the critical value, testing the value of the test statistic using the sample data, and interpreting these values.
First, a specific claim about the population parameter is decided based on the research question and is stated in a simple form. Further, an opposing statement to this claim is also stated. These statements can act as null and alternative hypotheses, out of which a null hypothesis would be a...
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量化儿童心脏外科手术决策中的随机变异性.

Kayla V Dlugos1,2,3, Mjaye Mazwi4, Marisa Signorile5

  • 1Institute of Medical Science, University of Toronto, Ontario, Canada.

JTCVS open
|July 9, 2025
PubMed
概括

医疗决策表现出显著的"噪音"或随机变化,影响质量和可重现性. 噪音审计量化了先天性心脏病护理中的这种变化,揭示了不同经验水平和角色的普遍噪音.

关键词:
生产性心脏手术 的.医疗决策中的医疗决策噪音 噪音 噪音 噪音噪音审计 噪音审计 审计 审计随机变化的随机变化.

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科学领域:

  • 医疗决策的制定 医疗决策的制定
  • 改善医疗保健质量 改善医疗保健质量
  • 生物统计学 生物统计学

背景情况:

  • 随机变量,称为"噪音",在各种领域对决策的可复制性和质量产生负面影响.
  • 噪音在医疗决策中的传播率和影响仍未得到充分研究.
  • 了解和量化噪音对于提高患者护理质量和决策一致性至关重要.

研究的目的:

  • 在儿科心脏病学中量化医疗决策中的噪音程度.
  • 评估噪音在不同级别的问题复杂性和专业经验中如何变化.
  • 建立一种可量化的方法来测量临床实践中的决策变化.

主要方法:

  • 在两个儿童医院,71名医疗保健专业人员进行了噪音审计.
  • 参与者回答了与先天性心脏病 (大动脉转移,关键大动脉狭窄) 相关的基于病例的问题.
  • 被用来量化响应变化,用标准化的和总比计算来比较群体和问题复杂性.

主要成果:

  • 总的汇总率为0.85,表明与复杂问题相比,更简单的问题的变化较小.
  • 经验超过10年的专业人员比经验较少的专业人员 (比率0.87) 噪音略低 (比率0.8).
  • 总率因角色而异:心脏危急护理 (0.85),心脏病学 (0.83) 和心血管手术 (0.96).

结论:

  • 噪音是对先天性心脏病的医疗决策的一个普遍因素.
  • 噪音审计成功量化了决策变化,使得比较分析成为可能.
  • 研究结果强调,需要制定策略来减轻噪音,提高临床判断的一致性.