Question

1 points Save Ans Regarding the selection of controls for a new case-control study of college students at Texas A&M University, which of the following are true you may select more than one)? a. Random digit dialing may be used to generate controls, but the utility of this approach is likely less than it used to be given the predominance of cell phones and paucity of land lines. b. Depending on the research question, one individual student may in some cases serve as both the case and his own control c. If cases are defined as students reporting to the campus health clinic with Disease X, then controls may be defined as students reporting to the campus health clinic over the same time period who were diagnosed with Disease Y d. If cases are defined as students reporting to the campus health clinic with Disease X, then controls may be defined as students reporting the campus health clinic over the same time period who were not diagnosed with Disease X of cases are defined as students reporting to the campus health clinic with Disease X, then controls may be defined as the best friends of these students. 1. None of the above.

Answer 1

Answer : ( c)

(d)

Because this both case studies are related to each other and can be used as one case study for analysis.