Drawing a directed acyclic graph (DAG) for blood transfusions after surgery

A directed acyclic graph (DAG) can help you take the right path. The image is CC by Ian Sane

A DAG can help you take the right path. The image is CC by Ian Sane

I recently wrote about blood transfusions and their inherent risk of postoperative infections. This post is a tutorial on some of the basics of drawing a directed acyclic graph (DAG). Blood transfusions and infections is a great topic as most are familiar with risk factors for infections. Continue reading