Researchers conduct a study to determine if the use of chlorhexidine mouthwash is more effective than the use of normal saline for oral care to reduce the incidence of ventilator-associated pneumonia.Which action by the researchers makes the study a randomized controlled trial?

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The researchers are conducting a randomized controlled trial if they do not know which patients will be treated with saline and which patients will be treated with chlorhexidine.This is done to reduce the risk of bias that could interfere with the validity of the results.The researchers are conducting the study to determine treatment will be more effective.Random selection of nurses to provide the oral care to the patients does not make the study a randomized controlled trial.The researchers will definitely know which statistical tests will be used to evaluate the effectiveness of the oral care protocols.

Researchers Conduct a Study to Determine If the Use of Chlorhexidine