Finding differentially expressed genes in high dimensional data: Rank based test statistic via a distance measure

Sunil Mathur, Ajit Sadana

    Research output: Contribution to journalArticlepeer-review

    Abstract

    We present a rank-based test statistic for the identification of differentially expressed genes using a distance measure. The proposed test statistic is highly robust against extreme values and does not assume the distribution of parent population. Simulation studies show that the proposed test is more powerful than some of the commonly used methods, such as paired t-test, Wilcoxon signed rank test, and significance analysis of microarray (SAM) under certain non-normal distributions. The asymptotic distribution of the test statistic, and the p-value function are discussed. The application of proposed method is shown using a real-life data set.

    Original languageEnglish (US)
    Pages (from-to)968-979
    Number of pages12
    JournalStatistical Methods in Medical Research
    Volume24
    Issue number6
    DOIs
    StatePublished - Dec 1 2015

    Keywords

    • differential
    • efficient
    • genes
    • power
    • rank
    • test statistic

    ASJC Scopus subject areas

    • Epidemiology
    • Statistics and Probability
    • Health Information Management

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