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A new study will investigate the link between oral contraceptive use and breast cancer. Of the following options which study design would offer the best level of evidence to answer the question (take into consideration quality of evidence, time taken to complete the study and ethics)? Question 7Select one:a.Ecological studyb.Case studyc.Cross-sectional studyd.Case-control study

Question

A new study will investigate the link between oral contraceptive use and breast cancer. Of the following options which study design would offer the best level of evidence to answer the question (take into consideration quality of evidence, time taken to complete the study and ethics)? Question 7Select one:a.Ecological studyb.Case studyc.Cross-sectional studyd.Case-control study

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Solution

The best study design to investigate the link between oral contraceptive use and breast cancer would be a case-control study (option d).

Here's why:

  1. Quality of Evidence: Case-control studies are observational in nature and can provide good quality evidence. They are particularly useful for studying diseases with long latency periods, like cancer.

  2. Time: Case-control studies are also relatively quick to complete because they involve individuals who already have the disease (cases) and those who do not (controls). This is in contrast to cohort studies, for example, which can take many years as researchers would need to wait for the disease to develop in some participants.

  3. Ethics: From an ethical standpoint, case-control studies are often more feasible than other types of studies. For instance, it would be unethical to expose people to a potential risk factor just to see if they develop the disease (as would be done in a randomized controlled trial). In a case-control study, researchers are simply observing and comparing past exposure to the risk factor (in this case, oral contraceptive use) between cases and controls.

Therefore, considering the quality of evidence, time taken to complete the study, and ethics, a case-control study would be the most suitable design for this research question.

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