From the list below, select the most relevant limitation for using the test described as a screening tool. Chest radiographs tend to lead to earlier recognition of lung cancers, with no impact on delaying the eventual time of death. Select one: O a, Low sensitivity O b. Low specificity O c. Lead-time bias O d. Length bias You are planning a new research project and have decided that a cohort study may be the best option. So you learn about the strengths and limitations of the study design. Based on what you've learnt which of the following is an advantage of a cohort study? Select one: O a. Incidence rates cannot be calculated O b. Recall bias is maximised compared with a case control study O c. It can usually be done more cheaply than a case-control study O d. Many disease outcomes can be studied simultaneously Next page