An Epidemiologic Experiment Is Performed in Which One Group Is

question 5

Multiple Choice

An epidemiologic experiment is performed in which one group is exposed to a suspected factor and the other is not. All individuals with an odd hospital admission number are assigned to the second group. The main purpose of this procedure is to:

• A) ensure a double-blind study.
• B) prevent observer bias with respect to the factor.
• C) prevent observer bias with respect to the outcome.
• D) improve the likelihood that the two groups will be comparable with regard to known and unknown confounding factors.
• E) guarantee comparability of the two groups with regard to other relevant factors.

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Definitions:

Reuptake Process

A mechanism in the nervous system where neurotransmitters are taken back into the neuron that released them, effectively ending the signal between neurons.

Cocaine

A powerful stimulant drug derived from the leaves of the coca plant, which can cause short-term euphoria, energy, and talkativeness.

Heroin

An opioid drug made from morphine, a natural substance taken from the seed pod of various opium poppy plants, highly addictive and illegal.

Amphetamines

A class of stimulant drugs that increase alertness, attention, and energy, often used medically and recreationally.