Applying Quantitative Bias Analysis to Epidemiologic DataBias analysis quantifies the influence of systematic error on an epidemiology studys estimate of association. The fundamental methods of bias analysis in epi miology have been well described for decades, yet are seldom applied in published presentations of epidemiologic research. More recent advances in bias analysis, such as probabilistic bias analysis, appear even more rarely. We suspect that there are both supply side and demand side explanations