The table shows the results of a screening test of fasting blood glucose with the cut-off...
The table shows the results of a screening test of fasting blood glucose with the cut-off at 140 mg/dl. Compute the sensitivity, specificity, and positive and negative predictive values.
Gold Standard for Diabetes Diagnosis
|
Screening test |
Positive |
Negative |
|
|
Positive |
34 |
20 |
54 |
|
Negative |
116 |
9830 |
9946 |
|
150 |
9850 |
10000 |
Homework Answers
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The table shows the results of a screening test of fasting blood
glucose with the cut-off...
Epidemiology question 3. ng the screening cut-off point affect sensitivity. specificity, PPV and NPV of the...
Epidemiology question
3. ng the screening cut-off point affect sensitivity. specificity, PPV and NPV of the test? Why? are the respective "costs" ring the screening cut-off point affect the number of false positives and false negatives associated with false positives and false negativesi ? What 5. sensitivity, PPV and NPV of the test? How would you expect raising the cut-off point to 220mg of blood glucose per 100ml to affect the specificity was repeated using the 130mg of blood glucose...
The most commonly used screening test for detection of Diabetes Mellitus is Fasting Blood Glucose...
The most commonly used screening test for detection of Diabetes Mellitus is Fasting Blood Glucose (FBG) test. However, like almost all screening tests, this test is not 100% accurate. In order to evaluate the FBG test carried out by a specific device: 'OneTouch Ultra 2' meter, a more rigorous test is used (a gold standard), which is the Glucose tolerance test. The Table below summarizes the data collected from the study to evaluate the FBG screening test. Please, calculate all...
please answer the question 6 using the given information. Thank you 5. A screening test for...
please answer the question 6 using the given
information. Thank you
5. A screening test for diabetes, where a blood glucose of 180 mg/dl is considered positive, has a known sensitivity of 22.5% and a known specificity of 99.7%. The prevalence of diabetes in Town X is 2% and Town Y is 1.5% 6. Based on Q 5, assuming there are 10000 people living in Town Y, how many people will test positive and be referred for additional testing? a....
Diabetes Screening Shown below are the real-life diagnostic characteristics of a particular diabetes-screening test – a...
Diabetes Screening Shown below are the real-life diagnostic characteristics of a particular diabetes-screening test – a fasting venous glucose measurement – from a hypothetical cross-sectional study population. Calculate the sensitivity, specificity and positive predictive value (PPV) of this screening test and estimate the prevalence of diabetes in the study population. Table: Results of fasting venous glucose screening for diabetes. Diabetes Screening Test Actual diabetes status Total Present Absent Positive (+) True + 67 False + 38 Total + 105 Negative...
A psychiatrist devised a short screening test for depression. In order to determine this new test’s...
A psychiatrist devised a short screening test for depression. In order to determine this new test’s validity, an independent blind comparison was made with a gold standard for diagnosis of depression among a group of 200 psychiatric outpatients. Among the 50 outpatients found to be depressed according to the gold standard, 35 patients were positive for the test. Among 150 patients found not to be depressed according to the gold standard, 30 patients were found to be positive for the...
The prevalence of undetected diabetes in a population to be screened is approximately 1.5%, and it is assumed that 10,00...
The prevalence of undetected diabetes in a population to be screened is approximately 1.5%, and it is assumed that 10,000 persons will be screened. The screening test will measure blood serum glucose content. A value of 180 mg% or higher is considered positive. The sensitivity and specificity of associated with this screening test are 22.9% and 99.8%, respectively . 10. Construct a 2x2 table. What is the positive predictive value? What is the negative predictive value?
For Questions 22 through 24, please refer to the following scenario. A new screening test for Lym...
For Questions 22 through 24, please refer to the following scenario. A new screening test for Lyme disease is developed for use in the general population. The sensitivity and specificity of the new test are 60% and 70%, respectively. Three hundred patients are screened at a clinic during the first year the new test is implemented. The prevalence of Lyme disease among clinic patients is 10%. Gold Standard diagnosis Disease Yes Disease No Total ScreeningPositive Negative 22. (3 points) Fill...
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
A new screening test for diabetes produced the following results: True Disease Status Screening test Positive Negative Positive 100 20 Negative 60 400 Based on these data, calculate the test's sensitivity, specificity, positive predictive value, negative predictive value, and the accuracy of the screening...
For Questions 22 through 24, please refer to the following scenario. A new screening test for...
For Questions 22 through 24, please refer to the following scenario. A new screening test for Lyme disease is developed for use in the general population. The sensitivity and specificity of the new test are 60% and 70%, respectively. Three hundred patients are screened at a clinic during the first year the new test is implemented. The prevalence of Lyme disease among clinic patients is 10%. Gold Standard diagnosis Disease Yes Disease No Total ScreeningPositive Negative 22. (3 points) Fill...
Diabetes mellitus is a group of metabolic diseases characterized by hyperglycemia resulting from defects in insulin secr...
Diabetes mellitus is a group of metabolic diseases characterized by hyperglycemia resulting from defects in insulin secretion, insulin action, or both. The prevalence of Type 2 diabetes mellitus is increasing—more than 9% of the adult U.S. population currently has this disorder. Diabetes is a leading cause of blindness, renal disease, and amputation and leads to increased mortality, primarily from cardiovascular events. The fasting plasma glucose (FPG) test is a blood test that determines the amount of glucose (sugar) in the...
Epidemiology question
3. ng the screening cut-off point affect sensitivity. specificity, PPV and NPV of the test? Why? are the respective "costs" ring the screening cut-off point affect the number of false positives and false negatives associated with false positives and false negativesi ? What 5. sensitivity, PPV and NPV of the test? How would you expect raising the cut-off point to 220mg of blood glucose per 100ml to affect the specificity was repeated using the 130mg of blood glucose...
The most commonly used screening test for detection of Diabetes Mellitus is Fasting Blood Glucose (FBG) test. However, like almost all screening tests, this test is not 100% accurate. In order to evaluate the FBG test carried out by a specific device: 'OneTouch Ultra 2' meter, a more rigorous test is used (a gold standard), which is the Glucose tolerance test. The Table below summarizes the data collected from the study to evaluate the FBG screening test. Please, calculate all...
please answer the question 6 using the given
information. Thank you
5. A screening test for diabetes, where a blood glucose of 180 mg/dl is considered positive, has a known sensitivity of 22.5% and a known specificity of 99.7%. The prevalence of diabetes in Town X is 2% and Town Y is 1.5% 6. Based on Q 5, assuming there are 10000 people living in Town Y, how many people will test positive and be referred for additional testing? a....
For Questions 22 through 24, please refer to the following scenario. A new screening test for Lyme disease is developed for use in the general population. The sensitivity and specificity of the new test are 60% and 70%, respectively. Three hundred patients are screened at a clinic during the first year the new test is implemented. The prevalence of Lyme disease among clinic patients is 10%. Gold Standard diagnosis Disease Yes Disease No Total ScreeningPositive Negative 22. (3 points) Fill...
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
A new screening test for diabetes produced the following results: True Disease Status Screening test Positive Negative Positive 100 20 Negative 60 400 Based on these data, calculate the test's sensitivity, specificity, positive predictive value, negative predictive value, and the accuracy of the screening...
For Questions 22 through 24, please refer to the following scenario. A new screening test for Lyme disease is developed for use in the general population. The sensitivity and specificity of the new test are 60% and 70%, respectively. Three hundred patients are screened at a clinic during the first year the new test is implemented. The prevalence of Lyme disease among clinic patients is 10%. Gold Standard diagnosis Disease Yes Disease No Total ScreeningPositive Negative 22. (3 points) Fill...
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