Intensive care units (ICUs) are complex care environments at high risk for medical errors. In this retrospective study, researchers identified the occurrence of common ICU scenarios and skills during code blue events and measured trainees’ self-reported confidence in these skills. The analysis found that more than 25% of trainees reported low levels of confidence in three scenarios – familiarity with the advanced life support trolley, electrocardiogram strip interpretation, and operation of an external defibrillator. This process of integrating critical incident data with trainee self-assessment can be generalized to other clinical scenarios to create targeted education and simulation curriculum.