Figure 1. Patient Selection, Randomization, and Flow in a Study of the Effect of High-Dose vs Standard-Dose Influenza Vaccine on Patients With High-risk Cardiovascular Disease.

The study was designed so that sites were able to assess each potential participant for eligibility prior to enrollment and consent based on inclusion and exclusion criteria as defined in the Methods. Only eligible patients were consented. All patients who were consented are included in the figure.