During her PhD research, she developed nonparametric methods to estimate the cumulative incidence of asymptomatic diseases, in particular the incidence of viral infections (HIV and Hepatitis A), and focussed on mathematical properties of these estimation methods. Her current research aims at more applied methodology in health science. She developed algorithms for more accurate estimation of cumulative incidence by correcting for misclassification of events due to limited accuracy of screening tests. Furthermore, she is involved in clinical decision research as a statistical consultant. Birgit teaches in the area of statistical methodology.