Two Infectious Disease Epidemiologists Want to Investigate a New Laboratory

question 7

Multiple Choice

Two infectious disease epidemiologists want to investigate a new laboratory test that identifies tuberculosis (TB) infections.Dr.Merritt uses the standard test,which has a sensitivity of 80% and a specificity of 90%.Dr.Foundry uses the new laboratory test,which is 90% sensitive and 99% specific.In City A,it is known that 100 of 1,000 people have TB infections.What is the positive predictive value of the standard test in City A?

• A) 10%
• B) 47%
• C) 53%
• D) 80%
• E) 90%

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Definitions:

Sense of Smell

The ability to perceive and identify odors through the olfactory system, an essential component of taste and environmental awareness.

Dementia

A wide range of neurological disorders characterized by a persistent and typically slow decline in cognitive abilities and memory, impacting an individual's everyday activities.

Ganzfeld Procedure

A technique used in parapsychology to test individuals for extrasensory perception, where the subject is exposed to a uniform sensory field to enhance psychic signals.

Extrasensory Perception (ESP)

Gaining information about objects, events, or another person’s thoughts through some means other than the known sensory channels.