NAPLEX (North American Pharmacist Licensure Examination) Practice Exam

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What is a limitation of a cohort study?

  1. Cannot reliably determine cause and effect

  2. Time-consuming and expensive

  3. Data is hard to obtain from medical records

  4. Does not generate hypotheses

The correct answer is: Time-consuming and expensive

A limitation of a cohort study is not time-consumption or expense, as the data and study population are followed for an extended period of time. Option A and C are not limitations, as cohort studies can help establish cause and effect relationships and often use data from medical records. Option D is also not a limitation, as cohort studies can be used to generate hypotheses and further research. However, option B is a limitation as it requires a significant amount of time, resources, and funding to gather and analyze data from a large sample size over a period of time. This can make cohort studies more challenging and costly to conduct than other study designs.

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