Table 7 .

Power to detect pleiotropy when associated traits have $\beta =0.25$ (explain 2% trait variation; power = 90% for marginal effect)

No. associated traits $\left(\beta =0.25\right)$	Trait correlation	Nominal type I error rate
		0.05	0.01
2	0.2	0.503	0.237
	0.5	0.801	0.581
	0.8	0.971	0.900
3	0.2	0.859	0.677
	0.5	0.956	0.858
	0.8	0.999	0.998
5	0.2	0.980	0.928
	0.5	0.999	0.985
	0.8	1.000	1.000

Shown is a multivariate normal distribution with equal correlation structure, for a sample size of 500 subjects and minor allele frequency of genetic variant set to 0.20.