A Study Aims to Investigate the Effectiveness of the Topical

question 16

Multiple Choice

A study aims to investigate the effectiveness of the topical application of tetracycline ointment in the prevention of surgical-site infection associated with resection of advanced oral cavity cancer.  Fifty patients who underwent locoregional resection were assigned by chance to receive standard care alone or tetracycline-ointment in addition to standard care.  The patients were then followed for 1 month and the number and severity of surgical-site infections were recorded for each group.  Which of the following best describes the study design?

• A)Case-control study
• B)Crossover design
• C)Prospective cohort study
• D)Randomized control trial
• E)Retrospective cohort study

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Definitions:

Nature

The intrinsic physical and material world all around us, not made or caused by humankind.

Normal Random Variable

A variable that follows a normal distribution, characterized by its mean and standard deviation.

Z-score

A numerical measurement that describes a value's relationship to the mean of a group of values, measured in terms of standard deviations from the mean.

Secretory Phase

A phase in the menstrual cycle where the endometrium thickens and prepares for possible implantation of an embryo.