A better coefficient of determination for genetic profile analysis Sang Hong Lee,1,* Michael E Goddard,2,3 Naomi R Wray,1,4 Peter M Visscher1,4,5 This is the peer reviewed version of the following article: Lee, S. H., M. E. Goddard, N. R. Wray and P. M. Visscher (2012). "A better coefficient of determination for genetic profile analysis." Genetic Epidemiology 36(3): 214-224, which has been published in final form at 10.1002/gepi.21614. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for self-archiving. 1Queensland Institute of Medical Research, 300 Herston Rd, Herston, QLD 4006, Australia; 2Biosciences Research Division, Department of Primary Industries, Victoria, Australia; 3Department of Agriculture and Food Systems, University of Melbourne, Melbourne, Australia; 4Queensland Brain Institute, University of Queensland, Brisbane, QLD 4072, Australia; 5Diamantina Institute, University of Queensland, Brisbane, QLD 4072, Australia Running head: A better coefficient of determination *Correspondence: Sang Hong Lee, 1Queensland Institute of Medical Research, 300 Herston Rd, Herston, QLD 4006, Australia. Tel: 61 7 3362 0168,
[email protected] ABSTRACT Genome-wide association studies have facilitated the construction of risk predictors for disease from multiple SNP markers. The ability of such ‘genetic profiles’ to predict outcome is usually quantified in an independent data set. Coefficients of determination (R2) have been a useful measure to quantify the goodness-of-fit of the genetic profile. Various pseudo R2 measures for binary responses have been proposed. However, there is no standard or consensus measure because the concept of residual variance is not easily defined on the observed probability scale.