1. The sensitivity of a test is: Please check the correct answer
    the percentage of false positive test results ...............................................   

    the percentage of false negative test results...............................................   

    the percentage of persons with disease having a positive test result...............

    the percentage of persons without the disease having a negative test result... 
     
     
  1.  The positive predictive value of a test is: Please check the correct answer
    2.  
    the percentage of persons without disease having a negative (normal) test result ....

    the percentage of persons with disease having a positive (abnormal) test result .... 

    the percentage of investigated persons having a positive (abnormal) test result.....  

    the percentage of investigated persons amongst those with a positive (abnormal)
    test result, who have the disease.....
     
  2. A diagnostic test has a sensitivity of 95% and a specificity of 95%. This test will help you diagnosing a rather rare disease (prevalence of 1%). What is the probability of a person with a positive test result to have the disease?
    3.  
    Please check the appropriate box

    < 25%................................. 

    about 50%............................

    almost 100%..........................

    do not know..........................
     
     
  3. The prevalence of endometrial carcinoma in all women consulting a physician because of abnormal uterine bleeding is about 10%.
    4.  
    A 65 year old woman presents to your practice because of abnormal uterine bleeding.

    What is the probability that this women has endometrial carcinoma?

    %
                  A. An additional diagnostic procedure is performed in this woman. The transvaginal ultrasound examination
                      reveals a finding on the cavum uteri, which is considered a positive result by the radiologist.
    What is your estimate of the probability that this woman has endometrial carcinoma ?
    %
           B. An additional diagnostic procedure is performed in this woman. The transvaginal ultrasound examination reveals
               a finding on the cavum uteri, which is considered a positive result by the radiologist. The sensitivity of this test
               procedure is 80% and the specificity 60%.  
    What is your estimate of the probability that this woman has endometrial carcinoma ?
    %

    C. An additional diagnostic procedure is performed in this woman. The transvaginal ultrasound examination reveals a finding on the cavum uteri, which is considered a positive result by the radiologist. A positive result is obtained twice as frequently in women with an endometrial carcinoma than in women without this disease.

    What is your estimate of the probability that this woman has endometrial carcinoma ?

    %

     
     
Access jobs at BMJ Careers
Whats new online at Student BMJ