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1. Which of the following is true about the characteristics of a screening test? (a) A highly sensitive screening test yields a very low number of false positive results (b) If a screening test is 99% specific, 99% of negative cases are diagnosed negative (c) A screening test is used to confirm discase and prescribe treatments (d) None of the above

1. Which of the following is true about the characteristics of a screening test? (a) A highly sensitive screening test yields a very low number of false positive results (b) If a screening test is 99% specific, 99% of negative cases are diagnosed negative (c) A screening test is used to confirm discase and prescribe treatments (d) None of the above

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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1. Which of the following is true about the characteristics of a screening test? (a) A highly sensitive screening test yields a very low number of false positive results (b) If a screening test is 99% specific, 99% of negative cases are diagnosed negative (c) A screening test is used to confirm disease and prescribe treatments (d) None of the above 2. Sensitivity of a screening test is (a) The probability of disease knowing that the test is positive (b) The probability of disease knowing that the test is negative (c) The probability of a positive test knowing that the patient has a disease (d) The probability of negative test knowing that the patient has no disease 3. A positive predictive value of a test was 0.2. which of the following is true: A. The probability of a positive test result knowing that the patient has disease positive is 20% B. The probability of disease knowing that the test is positive is 20% C. The prevalence of the disease in the population is 20% D. A and B E. All of the above 4. In the blood bank, technicians should make sure that the donor unit is free of blood-borne viruses such as HIV. The test used to check HIV in the donor unit should have A. High sensitivity B. High specificity C. Low specificity D. Low sensitivity 5. Which of the following statements is true about the precision and accuracy in epidemiology? a. A test is described as precise when its results are close to the true value and close to each other b. A test is described as precise when its results are close to each other c. A test is described as accurate when its results are close to each other d. All of the above
Transcribed Image Text:1. Which of the following is true about the characteristics of a screening test? (a) A highly sensitive screening test yields a very low number of false positive results (b) If a screening test is 99% specific, 99% of negative cases are diagnosed negative (c) A screening test is used to confirm disease and prescribe treatments (d) None of the above 2. Sensitivity of a screening test is (a) The probability of disease knowing that the test is positive (b) The probability of disease knowing that the test is negative (c) The probability of a positive test knowing that the patient has a disease (d) The probability of negative test knowing that the patient has no disease 3. A positive predictive value of a test was 0.2. which of the following is true: A. The probability of a positive test result knowing that the patient has disease positive is 20% B. The probability of disease knowing that the test is positive is 20% C. The prevalence of the disease in the population is 20% D. A and B E. All of the above 4. In the blood bank, technicians should make sure that the donor unit is free of blood-borne viruses such as HIV. The test used to check HIV in the donor unit should have A. High sensitivity B. High specificity C. Low specificity D. Low sensitivity 5. Which of the following statements is true about the precision and accuracy in epidemiology? a. A test is described as precise when its results are close to the true value and close to each other b. A test is described as precise when its results are close to each other c. A test is described as accurate when its results are close to each other d. All of the above
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