Average χ2 statistics for LT versus other approaches in simulated data.

For each statistic we display average results across 1,000,000 simulations, for various effect sizes γ. All statistics are χ2(1 dof). Logistic regression with an interaction term (G+GxE) values been converted from χ2(2 dof) to the equivalent χ2(1 dof) value. At an effect size of 0 all statistics give the expected value under the null. OR LBMI is the odds ratio computed from cases with BMI = 24. OR HBMI is the odds ratio for cases with BMI = 35.