Additional file 8: Figure S7. of The alarming problems of confounding equivalence using logistic regression models in the perspective of causal diagrams YuYuanyuan LiHongkai SunXiaoru SuPing WangTingting LiuYi YuanZhongshang LiuYanxun XueFuzhong 2017 Scenario 3 (Fig. 1c), simulation results of the bias and standard error of c-equivalence sets A 1 ≈ A 2 when varied across the log transformed odds ratio effect of T on Y, W on X and X on Y. (PDF 27 kb)