The strengths of this study include large sample size, with a
good representation of African American patients. However, we
recognize that our sample consisted primarily of patients with
early-stage disease and relatively high education. Enrollment in
the Health Registry did require at least 1 hour of patient
participation, which is likely more difficult for patients with
symptomatic advanced disease. It likely limits older patients
who may be dependent on others for transportation to appointments.
The time commitment may also explain the relatively
low participation rate for patients with lung cancer relative.
Additionally, another limitation of the study includes lack