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在呼吸道疾病研究中处理缺失的唾液样本的实用方法
Laurits Frøssing1, Susanne Hansen1,2, Morten Hvidtfeldt1
1Respiratory Research Unit, Department of Respiratory and Infectious Diseases, Bispebjerg Hospital, Copenhagen, Denmark.
ERJ open research
|November 19, 2025
概括
在研究中处理缺失的唾液样本至关重要. 这项研究比较了无条件中位数推算 (UCM) 和多重推算 (MI),发现这两种方法在预测临床结果方面都相似,但在增加缺失数据时引入了偏差.
科学领域:
- 呼吸系统医学 呼吸系统医学
- 生物统计学 生物统计学
- 临床研究方法论 临床研究方法论
背景情况:
- 缺失的唾液样本是临床研究中的一个重大挑战.
- 这阻碍了基于的对结结果指标的分析.
- 处理缺失数据的有效策略对于可靠的研究结果至关重要.
研究的目的:
- 评估不同缺失数据处理方法对研究成果的影响.
- 在唾液样本数据的背景下,比较无条件中位数归算 (UCM) 和多重归算 (MI).
- 在不同的缺失数据频率下评估归算技术的性能.
主要方法:
- 来自3项涉及115名患者的干预研究的数据.
- 使用UCM和MI计算的乙酸和中性酸细胞计数.
- 使用线性回归比较归算方法对预测肺功能和呼吸道过度反应性的影响.
- 在20%,40%和60%的频率上模拟缺失的数据,以将归算值与真值进行比较.
主要成果:
- 在UCM和MI之间没有观察到预测临床结果的显著差异.
- 这两种归算方法都显示,随着缺失数据比例的增加,偏差越来越大.
- 无条件中位数归算 (UCM) 引入了系统的比例偏差和更窄的协议边界.
- 协议限制的宽度大大减少,只有20%的样本缺失.
结论:
- 计算方法提高了统计能力,并有效地解决了缺少的数据.
- 报告基于唾液的结果应包括完整的病例分析和归算数据.
- 在选择归算方法时,应考虑研究设计,潜在的偏差和估计后果.
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