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:

Conditioned Response

The learned reaction to a previously neutral stimulus, brought about by conditioning.

Reflex

An automatic, involuntary response to a stimulus that does not involve conscious thought, designed to protect the body.

Maturation

Changes that occur according to one’s genetically determined biological timetable of development.

Learning

A process that induces changes in knowledge, behaviors, or attitudes through experience, practice, or study.