Table 1.

Parameter Values for the Logistic Regression Model (Equation 5) Used in the Simulation Studies

MOR	Parameter	RERIa
		0.5	1	1.5	2
MOR(G)b = 1.2	exp(βG1)	1.16	1.06	0.96	0.85
MOR(E)c = 2.5	exp(βE1)	2.45	2.21	1.98	1.74
	exp(γ11)	1.09	1.39	1.80	2.42
MOR(G) = 1.2	exp(βG1)	1.20	1.10	0.99	0.87
MOR(E) = 3.5	exp(βE1)	3.58	3.18	2.79	2.38
	exp(γ11)	0.99	1.22	1.55	2.05

Abbreviations: MOR, marginal odds ratio; RERI, relative excess risk due to interaction.

^a RERI is a measure of additive interaction defined as .

^b MOR for the genetic factor G.

^c MOR for the environmental factor E.