A New Screening Test for Lyme Disease Is Developed for Use

question 14

Multiple Choice

A new screening test for Lyme disease is developed for use in the general population. The sensitivity and specificity of the new test are 60% and 70%, respectively. Three hundred people are screened at a clinic during the first year the new test is implemented. (Assume the true prevalence of Lyme disease among clinic attendees is 10%.) The predictive value of a positive test is:

• A) 33.0%.
• B) 18.2%.
• C) 94.0%.
• D) 22.2%.
• E) 6.0%.

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Definitions:

Nitrogens

A rephrasing of "Nitrogens" would be: Chemical elements with the symbol N, essential for all living organisms as a constituent of proteins and nucleic acids.

HCN Bond Angle

The angle between the hydrogen, carbon, and nitrogen atoms in hydrogen cyanide, typically close to 180 degrees due to its linear molecular shape.

Hydrogen Cyanide

A highly toxic and volatile chemical compound with the formula HCN, characterized by a distinctive bitter almond odor.

Hybridization

The concept in chemistry where atomic orbitals mix to form new hybrid orbitals, which are suitable for the pairing of electrons to form chemical bonds in molecular compounds.