Which of the Following Statements Is Not an Accurate Description

Multiple Choice

Which of the following statements is not an accurate description of epidemiologic studies using large group data such as National Hospital Discharge Survey or National Health Interview Survey?

A) The advantage of using large data sets is that the data refer to real-world populations; the issue of representativeness is minimized.
B) Because the data sets exist at the time the research is initiated, analysis can be completed and results generated relatively rapidly.
C) Given the large data sets used, sample size is usually considered a major problem.
D) Data are usually gathered for fiscal and administrative purposes; they may not be well suited for scientific research.
E) When necessary variables or questions are absent, the investigators may consciously or subconsciously change the research questions.