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    題名: Robust methods for detecting familial aggregation of a quantitative trait in matched case-control family studies
    作者: Wang, Jiun-yi;Chen, Li-ching;Lin, Hui-min
    貢獻者: 淡江大學統計學系
    關鍵詞: case–control family studies;familial aggregation;matched design;proband sampling;within-cluster resampling
    日期: 2012-10
    上傳時間: 2012-09-26 11:45:03 (UTC+8)
    出版者: Abingdon: Routledge
    摘要: Assessing familial aggregation of a disease or its underlying quantitative traits is often undertaken as the first step in the investigation of possible genetic causes. When some major confounding variables are known and difficult to be quantified, the matched case–control family design provides an opportunity to eliminate biased results. In such a design, cases and matched controls are ascertained first, with subsequent recruitment of other members in their families. For the study of complex diseases, many continuously distributed quantitative traits or biomedical evaluations are of primary clinical and health significance, and distributions of these continuous outcomes are frequently skewed or non-normal. A non-normal distributed outcome may lead some standard statistical methods to suffer from loss of substantial power. To deal with the problem, in this study, we thus propose a rank-based test for detecting familial aggregation of a quantitative trait with the use of a within-cluster resampling process. According to our simulation studies, the proposed test expresses qualified and robust power performance. Specifically, the proposed test is slightly less powerful than the generalized estimating equations approach if the trait is normally distributed, and it is apparently more powerful if the trait distribution is essentially skewed or heavy-tailed. A user-friendly R-script and an executable file to perform the proposed test are available online to allow its implementation on ordinary research.
    關聯: Journal of Applied Statistics 39(10), 2097-2111
    DOI: 10.1080/02664763.2012.702204
    顯示於類別:[統計學系暨研究所] 期刊論文


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