Related Experiment Video
Updated: Jun 11, 2026
Using Human Differentially Expressed Gene Lists to Perform Downstream Pathway Enrichment Analysis and Target Prioritization
Published on: October 3, 2025
Detecting differentially expressed genes: minimizing burden of testing and maximizing number of discoveries
1Research Center for Genes, Environment and Human Health and Graduate Institute of Epidemiology, College of Public Health, National Taiwan University, Taipei, Taiwan. wenchung@ntu.edu.tw
Purpose:
Recent progress in DNA microarray technologies allows researchers to perform genome-wide screening to detect differentially expressed genes. Under the paradigm of false discovery rate control, this paper presents sample size methods.
Methods:
The author considers the following two scenarios: 1) planning the sample size to keep the 'burden of testing' (defined as the expected number of genes that have to be tested before a true discovery can be made) below a certain level, and 2) given a fixed amount of budget, balancing the number of subjects to be recruited and the number of genes to be tested to maximize the total number of true discoveries.
Results:
The study calculates sample sizes to minimize the burden of testing or to maximize the number of discoveries.
Conclusions:
The present approach to sample size calculation bears more direct relevance to gene-discovery studies.
