A diagnostic laboratory test correctly identifies 90 out of 100 patients with a disease (sensitivity = 90%) and correctly identifies 950 out of 1,000 healthy individuals (specificity = 95%). If the disease prevalence is 2.0% in a cohort of 5,000 individuals, how many true positive cases are identified?
Answer and explanation
Correct answer: D. 90
In a population of 5,000 with 2.0% prevalence, the number of individuals with the disease is 5,000 0.02 = 100 individuals. With a sensitivity of 90%, the number of true positive cases correctly identified is 100 0.90 = 90 patients.
Practise more Integral Calculus, Analytic Geometry, Statistics, and Medical Physics.
Free questions with an explanation for every one, and full timed Toelatingsexamen Arts & Tandarts België (Medical & Dental Entrance Exam) mock tests.
More Integral Calculus, Analytic Geometry, Statistics, and Medical Physics questions
- What is the value of the definite integral integral_{0}^{1} x * e^(x^2) dx?
- Using integration by parts, what is the antiderivative of f(x) = x * cos(x)?
- What is the volume of the solid of revolution formed by rotating the region under the curve y = sqrt(x) from x = 0 to x = 4 around the x-axi…
- In clinical pharmacokinetics, a drug is eliminated via first-order kinetics with an elimination rate constant ke = 0.1386 h^-1. If the initi…
- What is the center and radius of the circle defined by the equation x^2 + y^2 - 6x + 8y = 0?
- What is the perpendicular distance from the point P(2, 3) to the straight line given by the equation 3x + 4y - 8 = 0?