Instructions

Assessing the validity and Reliability of Diagnostic and Screening Tests Questions 1, 2, and 3 are based on the information given below: A physical examination was used to screen for breast cancer in 2,500 women with biopsy proven adenocarcinoma of the breast and in 5.000 age- and race-matched control women. The results of the physical REVIEW QUESTIONS FOR CHAPTER 5 121 desemination were positive (te a mass was palpated) in 1.800 cases and in 800 control women, all of whom showed no evidence of cancer at biopsy. The sensitivity of the physical examination was 2 The specificity of the physical examination was: The positive predictive value of the physical examination was Question 4 is based on the following information: A screening test is used in the same way in two similar populations, but the proportion of false-positive results among those who test positive in population A is lower than that among those who test positive in population 8. What is the likely explanation for this finding? a. It is impossible to determine what caused the d. The prevalence of disease is higher in difference population A b. The specificity of the test is lower in e. The specificity of the test is higher in population A population A c. The prevalence of disease is lower in population A Was Question 4 is based on the following information: A screening test is used in the same way in two similar populations, but the proportion of false-positive results among those who test positive in population A is lower than that among those who test positive in population B What is the likely explanation for this finding? a. It is impossible to determine what caused the difference d. The prevalence of disease is higher in b. The specificity of the test is lower in population A population A c. The specificity of the test is higher in c. The prevalence of disease is lower in population A population A Question 5 is based on the following information: A physical examination and an audiometric test were given to 100 persons with suspected hearing problems, of whom 300 were actually found to have them. The results of the examinations were as follows: HEARING PROBLERS Present Absent Result Physical Examination Positive Negative Audiometric Test Positive Negative 240 60 40 160 270 30 60 140 5 compared with the physical examination, the audiometric test is a. Equally sensitive and specific d. More sensitive and less specific b. Less sensitive and less specific e. More sensitive and more specific c. Less sensitive and more specific Question 6 is based on the following information: Two pediatricians want to investigate a new laboratory test that identifies streptococcal infections, Dr. Kidd uses the standard culture test, which has a sensitivity of 90% and a specificity of 96%. Dr. Childs uses the new test, which is 96% sensitive and 96% specific.

Order with us today for a quality custom paper on the above topic or any other topic!

What Awaits you:

• High Quality custom-written papers

• Automatic plagiarism check

• On-time delivery guarantee

• Masters and PhD-level writers

• 100% Privacy and Confidentiality