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However, complex diseases are usually measured by multiple correlated phenotypes. Analyzing each disease phenotype individually is likely to reduce statistical power due to multiple testing correction. In order to conquer the disadvantage, we proposed a principal component analysis (PCA)\u2013based GRS analysis approach. Extensive simulation studies were conducted to compare the performance of PCA-based GRS analysis and traditional GRS analysis approach. Simulation results observed significantly improved performance of PCA-based GRS analysis compared to traditional GRS analysis under various scenarios. For the sake of verification, we also applied both PCA-based GRS analysis and traditional GRS analysis to a real Caucasian genome-wide association study (GWAS) data of bone geometry. Real data analysis results further confirmed the improved performance of PCA-based GRS analysis. Given that GWAS have flourished in the past decades, our approach may help researchers to explore the genetic architectures and relationships of complex diseases or traits.<\/jats:p>","DOI":"10.1093\/bib\/bby075","type":"journal-article","created":{"date-parts":[[2018,8,3]],"date-time":"2018-08-03T07:11:41Z","timestamp":1533280301000},"page":"2291-2298","source":"Crossref","is-referenced-by-count":9,"title":["PCA-based GRS analysis enhances the effectiveness for genetic correlation detection"],"prefix":"10.1093","volume":"20","author":[{"given":"Yan","family":"Zhao","sequence":"first","affiliation":[{"name":"School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, P. R. China"}]},{"given":"Yujie","family":"Ning","sequence":"additional","affiliation":[{"name":"School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, P. R. China"},{"name":"Health Science Center, Xi'an Jiaotong University, Xi'an, P. R. China"}]},{"given":"Feng","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, P. R. China"}]},{"given":"Miao","family":"Ding","sequence":"additional","affiliation":[{"name":"School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, P. R. China"}]},{"given":"Yan","family":"Wen","sequence":"additional","affiliation":[{"name":"School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, P. R. China"}]},{"given":"Liang","family":"Shi","sequence":"additional","affiliation":[{"name":"Health Science Center, Xi'an Jiaotong University, Xi'an, P. R. China"}]},{"given":"Kunpeng","family":"Wang","sequence":"additional","affiliation":[{"name":"Health Science Center, Xi'an Jiaotong University, Xi'an, P. R. China"}]},{"given":"Mengnan","family":"Lu","sequence":"additional","affiliation":[{"name":"Health Science Center, Xi'an Jiaotong University, Xi'an, P. R. China"}]},{"given":"Jingyan","family":"Sun","sequence":"additional","affiliation":[{"name":"Health Science Center, Xi'an Jiaotong University, Xi'an, P. R. China"}]},{"given":"Menglu","family":"Wu","sequence":"additional","affiliation":[{"name":"Health Science Center, Xi'an Jiaotong University, Xi'an, P. R. China"}]},{"given":"Bolun","family":"Cheng","sequence":"additional","affiliation":[{"name":"School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, P. R. China"}]},{"given":"Mei","family":"Ma","sequence":"additional","affiliation":[{"name":"School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, P. R. China"}]},{"given":"Lu","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, P. R. China"}]},{"given":"Shiqiang","family":"Cheng","sequence":"additional","affiliation":[{"name":"School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, P. R. China"}]},{"given":"Hui","family":"Shen","sequence":"additional","affiliation":[{"name":"Center for Bioinformatics and Genomics, Department of Global Biostatistics and Data Science, School of Public Health and Tropical Medicine, Tulane University, China"}]},{"given":"Qing","family":"Tian","sequence":"additional","affiliation":[{"name":"Center for Bioinformatics and Genomics, Department of Global Biostatistics and Data Science, School of Public Health and Tropical Medicine, Tulane University, China"}]},{"given":"Xiong","family":"Guo","sequence":"additional","affiliation":[{"name":"School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, P. R. 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