Which of the Following Is the Source of Confounding Variables

question 9

Multiple Choice

Which of the following is the source of confounding variables in cohort studies?

• A) The researcher's decision regarding whom to ask to be in the study
• B) The fact that the two groups may be different in ways other than the risk factor of interest
• C) The researcher's choice regarding the outcome to study
• D) The use of retrospective methods rather than prospective methods

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Definitions:

Flexes Neck

The action of bending or moving the neck forward, performed by several muscles including the sternocleidomastoid and scalene muscles.

Zygomaticus Major

A facial muscle that draws the mouth upward and outward, mainly responsible for smiling.

Digastric

A muscle located under the jaw that consists of two bellies connected by an intermediate tendon and aids in the opening of the mouth.

Sternohyoid

A muscle in the anterior neck that depresses the hyoid bone and larynx during swallowing and speech.