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arXiv 2207.00554stat.MEstat.AP
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单细胞RNA测序数据潜变量估计后的推断

Inference after latent variable estimation for single-cell RNA sequencing data

Anna Neufeld, Lucy L. Gao, Joshua Popp, Alexis Battle, Daniela Witten

摘要:

在单细胞RNA测序数据的分析中,研究人员通常通过估计代表单个细胞状态的某些方面的潜在变量(如细胞类型或伪时间)来表征细胞之间的变化。然后,他们测试每个基因与估计的潜在变量的关联。如果这两个步骤使用相同的数据,则在第二步中计算p值和置信区间的标准方法将无法实现统计保证,例如1类错误控制。此外,可以应用于解决其他环境中类似问题的方法(例如样本分割)在此背景下不适用。在本文中,我们介绍了计数分裂,一个灵活的框架,使我们能够进行有效的推理,在这种情况下,几乎任何潜在的变量估计技术和推理方法,根据泊松假设。我们在模拟研究中展示了1型错误控制和计数分裂的能力,并将计数分裂应用于多能干细胞分化为心肌细胞的数据集。

英文摘要:

In the analysis of single-cell RNA sequencing data, researchers often characterize the variation between cells by estimating a latent variable, such as cell type or pseudotime, representing some aspect of the individual cell's state. They then test each gene for association with the estimated latent variable. If the same data are used for both of these steps, then standard methods for computing p-values and confidence intervals in the second step will fail to achieve statistical guarantees such as Type 1 error control. Furthermore, approaches such as sample splitting that can be applied to solve similar problems in other settings are not applicable in this context. In this paper, we introduce count splitting, a flexible framework that allows us to carry out valid inference in this setting, for virtually any latent variable estimation technique and inference approach, under a Poisson assumption. We demonstrate the Type 1 error control and power of count splitting in a simulation study, and apply count splitting to a dataset of pluripotent stem cells differentiating to cardiomyocytes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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