Researchers Want to Explore the Association Between Selective Serotonin Reuptake

Researchers want to explore the association between selective serotonin reuptake inhibitor (SSRI) use and pulmonary tuberculosis.  A random sample of subjects age 20-84 with newly diagnosed pulmonary tuberculosis and an independent random sample of subjects without pulmonary tuberculosis are enrolled in the study.  Subsequently, subjects who never had a prescription for an SSRI are defined as "never users," and those who have had a prescription for an SSRI are defined as "users."  The study compares the frequency of SSRI use in subjects with and without a diagnosis of pulmonary tuberculosis and determines that SSRI use is not associated with pulmonary tuberculosis.  Which of the following best describes the design of this study?

A) Case-control study
B) Cross-sectional study
C) Prospective cohort study
D) Randomized controlled trial
E) Retrospective cohort study

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