Table 4 Power Using Controls in All Tests. CC^a= Pearson's Chi-Square with twice as many controls as cases. CC^b= Pearson's Chi-Square with four times as many controls as cases. LR 1 = likelihood ratio test with 1 df, LR 2 = likelihood ratio test with 2 df. Both likelihood tests used twice as many controls as cases.

r₁ = 1

r₁ = $\sqrt{r_0}$

r₁ = r₀

LR 1

LR 2

LR 1

LR 2

LR 1

LR 2

q

r ₀

CC^a

CC^b

CC^a

CC^b

CC^a

CC^b