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.

Question

Quizplus · Accepted Answer

Because the large data sets used have large participants in the study,sample size is usually not considered as a problem except in a subgroup analysis."The advantage of using large data sets is that the data refer to real-world populations; the issue of representativeness is minimized" and "Because the data sets exist at the time the research is initiated,analysis can be completed and results generated relatively rapidly" are correct explanations.Those are advantages of using large group data in epidemiologic studies."Data are usually gathered for fiscal and administrative purposes; they may not be well suited for scientific research" and "When necessary variables or questions are absent,the investigators may consciously or subconsciously change the research questions" are correct explanations.However,those explanations are disadvantages of using large group data.

Which of the Following Statements Is Not an Accurate Description