Predicted accuracy and percentage prediction error assessed by simulation with disease prevalence = 0.1 (SE range 0.0004�C0.0065).

a�� = number of phenotypes per number of loci.bh2 = heritability (observed scale for C and DP, liability scale for DC).cP = predicted accuracy of estimated additive genetic value.d% error = percentage prediction error = 100(P?accuracy from simulation)/P.eC = continuous phenotype.fDP = dichotomous phenotype, population study.gDC = dichotomous phenotype, case control study.