Chadi hosts Lars Andersen, MD, MPH, PhD, DMSc, Aarhus University Hospital (Denmark), to discuss an interesting, relatively unknown concept he recently explored in JAMA Guide to Statistics and Methods. Dr. Andersen introduces us to “collider bias” in research design and statistical analysis. He utilizes a few common examples to illustrate how collider bias can affect our interpretation of data, how it differs from confounding and information bias, and rates the quality of COVID-19 research with relation to collider bias. This is an important discussion that will alter how you assess the validity of data and results of published research.View Dr. Andersen’s paper “Collider Bias.”https://jamanetwork.com/journals/jama/fullarticle/2790247Check out Chadi’s website for all Healthcare Unfiltered episodes and other content. www.chadinabhan.com/Watch all Healthcare Unfiltered episodes on Youtube. www.youtube.com/channel/UCjiJPTpIJdIiukcq0UaMFsA