Researchers Are Evaluating a Diagnostic Test for Legionella Infection That

question 164

Multiple Choice

Researchers are evaluating a diagnostic test for Legionella infection that relies on detection of bacterial antigens in the serum.  The test is compared to bacterial cultures, which are the gold standard for diagnosis.  A sample of 200 patients is selected.  Among 100 patients with culture-positive infection, the antigen test was positive in 90 patients.  Among 100 patients with negative cultures, the test was positive in 30 patients.  What was the positive predictive value of the new serum antigen test in this sample?

• A)30%
• B)70%
• C)75%
• D)88%
• E)90%

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Definitions:

Patient and Family Outcomes

The impact of healthcare interventions and treatments on the wellbeing, satisfaction, and health status of patients and their families.

Types of Comfort

Various ways through which individuals achieve a state of physical, psychological, and spiritual ease, including relief from pain, empowerment, and transcendence.

Relief

The alleviation or reduction of pain, distress, or anxiety, often as an outcome of effective medical treatment or therapy.

Holistic Interventions

Approaches to treatment or care that consider the whole person, including their physical, mental, emotional, social, and spiritual well-being.