A two-stage design for multiple testing in large-scale association studies

Shu Hui Wen, Jung Ying Tzeng, Jau Tsuen Kao, Chuhsing Kate Hsiao

研究成果: Article同行評審

8 引文 斯高帕斯(Scopus)

摘要

Modern association studies often involve a large number of markers and hence may encounter the problem of testing multiple hypotheses. Traditional procedures are usually over-conservative and with low power to detect mild genetic effects. From the design perspective, we propose a two-stage selection procedure to address this concern. Our main principle is to reduce the total number of tests by removing clearly unassociated markers in the first-stage test. Next, conditional on the findings of the first stage, which uses a less stringent nominal level, a more conservative test is conducted in the second stage using the augmented data and the data from the first stage. Previous studies have suggested using independent samples to avoid inflated errors. However, we found that, after accounting for the dependence between these two samples, the true discovery rate increases substantially. In addition, the cost of genotyping can be greatly reduced via this approach. Results from a study of hypertriglyceridemia and simulations suggest the two-stage method has a higher overall true positive rate (TPR) with a controlled overall false positive rate (FPR) when compared with single-stage approaches. We also report the analytical form of its overall FPR, which may be useful in guiding study design to achieve a high TPR while retaining the desired FPR.

原文English
頁(從 - 到)523-532
頁數10
期刊Journal of Human Genetics
51
發行號6
DOIs
出版狀態Published - 2006 六月

All Science Journal Classification (ASJC) codes

  • 遺傳學
  • 遺傳學(臨床)

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