A screening test for breast cancer is used in the same way in two similar populations,...
A screening test for breast cancer is used in the same way in two similar populations, population A and population B. The positive predictive value for the screening test in population A is higher than the positive predictive value population B. What is the likely explanation of this discovery? (NOTE: The same test is used the same way in the two populations) (Choose the one best answer)
The prevalence of disease is lower in population A than in population B.
The prevalence of disease is higher in population A than in population B.
The specificity of the test is lower in population A than in population B.
The specificity of the test is higher in population A than in population B.
Homework Answers
The correct option is
The prevalence of disease is higher in population A than in population B, because positive predictive value means the true positive prevelance is higher in population A.
Second the same test was used in same way the spacificity will be equal in both the cases. So option second is correct.
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A screening test for breast cancer is used in the same way in
two similar populations,...
A woman is worried that she might have breast cancer. The standard test for breast cancer...
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A woman is worried that she might have breast cancer. The standard test for breast cancer...
A woman is worried that she might have breast cancer. The standard test for breast cancer is mammography. From research she found online, she discovers the sensitivity for the mammography screening is 89% and the specificity is 96%. Her doctor has told her that one in 61 women in her forties will have breast cancer. Based on the sensitivity, specificity, and prevalence, determine the positive predictive value (PPV) for the mammography screening. Express your answer to three decimal places. PPV...
Suppose that the prevalence of breast cancer in a certain population of women is 0.30. Assume...
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Suppose that your company has just developed a new screening test for a disease and you...
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screening test, respectively. Interpret your findings. Would you recommend that this test be used to screen...
screening test, respectively.
Interpret your findings. Would you recommend that this test be used
to screen for diabetes in general populations, and why or why
not?
You need to show step-by-step calculations to earn maximum
credit
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A new screening test for Lyme disease is developed for use in the general population. The...
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Suppose that the prevalence of breast cancer in a certain population of women is 0.30. Assume that the sensitivity of a mammogram to detect breast cancer is 0.83, and the specificity of a mammogram is 0.90. What is the predictive value positive for this test, in this population?
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screening test, respectively.
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to screen for diabetes in general populations, and why or why
not?
You need to show step-by-step calculations to earn maximum
credit
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