In this new paper published at @bmj.commedicine, we describe detection bias (when treatment influences ascertainment of the outcome) and how negative control outcomes can help us <detect> detection bias.
bmjmedicine.bmj.com/content/4/1/...
bmjmedicine.bmj.com
Detection bias and the role of negative control outcomes
Investigators, patients, or clinicians knowing which treatment is assigned in pragmatic randomised trials and observational analyses can lead to detection bias (ie, systematic differences in determini...