Are clinical tests that can detect the disease well (large AUC) always “good” tests (in the sense having high specificity and sensitivity)? Why or why not?
We know that,
The area under the ROC curve (AUC) results were considered excellent for AUC values between 0.9-1, good for AUC values between 0.8-0.9, fair for AUC values between 0.7-0.8, poor for AUC values between 0.6-0.7 and failed for AUC values between 0.5-0.6.
Hence,
Clinical tests with large AUC are always "good" test.
Thank you.
Are clinical tests that can detect the disease well (large AUC) always “good” tests (in the...
Problem 1 [Sans R (a). Say a test can detect a disease with a type I error rate (false positive) of 10 % and a type II error rate (missed positive) of 0.1 %. If a person is randomly chosen from the population, the chance of having this disease is 0.1 %. If a random person is chosen from the population and tests positive for this disease, what is the probability they have this disease? (b). Say a test can...
Although the concepts of sensitivity and specificity are usually applied to diagnostic laboratory or screening tests, they are equally valid for other tests that indicate the presence or absence of disease. These may be tests designed to elicit certain physical signs of disease by examination (e.g. hypertension, cervical cancer, neurological defects, and tendency to hemorrhage) or questions aimed at uncovering symptoms. Suppose that a short psychometric questionnaire that was devised to detect undiagnosed cases of personality disorder was found, after...
Although the concepts of sensitivity and specificity are usually applied to diagnostic laboratory or screening tests, they are equally valid for other tests that indicate the presence or absence of disease. These may be tests designed to elicit certain physical signs of disease by examination (e.g. hypertension, cervical cancer, neurological defects, and tendency to hemorrhage) or questions aimed at uncovering symptoms. Suppose that a short psychometric questionnaire that was devised to detect undiagnosed cases of personality disorder was found, after...
Problem 4. Screening Tests Suppose that a certain disease is prese test designed to detect this disease if present. The test does not always work perfectly. Sometimes the test is negative when the disease times that the test produces various results. nt in 10% of the population, and that there is a screening is present, and sometimes it is positive when the disease is absent. The table below shows the proportions of Test is Positive (P) Test is Negative (N)...
Medical screening tests are used to check for the presence on disease, evidence of illegal drug use, etc. The its sensitivity and its specificity. The sensitivity among those with the condition that will test positive. The specichy proportion among those without the condition that will test neg sensitivity of a test is defined to be the conditional ng those without the condition that will test negative. More formally, the test is defined to be the conditional probability that a person...
Describe why you think you will make a good clinical social work student as well as an effective social worker.
Describe why you think you will make a good clinical social work student as well as an effective social worker. Discuss your readiness for rigorous graduate work. How/when will you manage 20 hours of graduate work every week?
Excerpt: “Blood tests [for herpes] can be highly unreliable. The kind of test used to diagnose Lauren, an IgM test, has long been rejected by the Centers for Disease Control and Prevention but is still used by some clinicians. Meanwhile, the CDC and the US Preventive Services Task Force concur that the most widely available herpes test, called HerpeSelect, should not be used to screen asymptomatic people because of its high risk of false positives: Up to 1 in 2...
6. What would you expect for clinical manisfestations?
7. What diagnostic tests might be used?
8. What treatment measures would you anticipate?
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1. Someone new is preparing media for lab and adds buffers to the EMB agar that raise the pH to 7.8. The starting pH of EMB plates should be 6.9 – 7.3. No one is aware of the change. The EMB plates are inoculated for identification of unknown bacteria. After the appropriate incubation time, the results are interpreted. A. Discuss the consequences of the change in starting pH to the interpretation of the results. (The answer is not that no...