A 45-year-old woman arrives to the office complaining of a palpable thyroid node. According to her medical history, she was diagnosed with medulloblastoma as a youngster and treated with chemotherapy and external beam radiation. Thyroid fine-needle aspiration reveals no cancerous cells. "What are the possibilities that I don't have thyroid cancer?" the patient wonders as the test findings are revealed to her. Which of the diagnostic test parameters listed below would be most helpful in addressing this patient's question?

Question

Quizplus · Accepted Answer

Eductional Objective: The positive predictive value (PPV) of a test answers the question: If the test result is positive, what is the probability that a patient has the disease? PPV = true positives / (true positives + false positives).

A 45-Year-Old Woman Arrives to the Office Complaining of a Palpable