### Family-based association test using normal approximation to gene dropping null distribution.

*Ontology highlight*

**ABSTRACT**: We derive the analytical mean and variance of the score test statistic in gene-dropping simulations and approximate the null distribution of the test statistic by a normal distribution. We provide insights into the gene-dropping test by decomposing the test statistic into two components: the first component provides information about linkage, and the second component provides information about fine mapping under the linkage peak. We demonstrate our theoretical findings by applying the gene-dropping test to the simulated data set from Genetic Analysis Workshop 18 and comparing its performance with existing population and family-based association tests.

**SUBMITTER: **Jiang Y

**PROVIDER: **S-EPMC4143692 | BioStudies | 2014-01-01

**SECONDARY ACCESSION(S): **DK085501

**REPOSITORIES: ** biostudies

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