All Questions
Tagged with sensitivity-specificity epidemiology
7 questions
1
vote
0
answers
22
views
Hypergeometric approximation of herd sensitivity and its non-linear nature
I have recently been exploring the use of the equation described in Cannon 2001 paper "Sense and Sensitivity" on herd sensitivity (love the name).
I have been looking to test a hypothetical ...
- 63
0
votes
2
answers
43
views
Relationship between sensitiviy, probability of detection and Prevalence
Folks, I have 3 questions:
If I know the number of exams performed with a specific test on a group of patients and the test's sensitivity, can I directly estimate the overall probability of detecting ...
0
votes
0
answers
30
views
Assess sensitivity of a binary screening result across other continuous covariate(s)
I want to assess the sensitivity of a diagnostic screening test, which is a binary test (screen +ve and screen -ve). There is no continuous measure from this test - it is literally yes or no.
My ...
2
votes
1
answer
242
views
How to tell the likelihood of getting a false positive?
Say we have a test for a disease we are comparing with the gold standard. You are given the prevalence of the disease, which is 1%, and sensitivity, 80%, and specificity, 90% and a total population of ...
13
votes
9
answers
3k
views
Is sensitivity or specificity a function of prevalence?
Standard teaching says that sensitivity and specificity are properties of the test and are independent of prevalence. But isn't this just an assumption?
Harrison's principles of internal medicine ...
- 257
1
vote
1
answer
329
views
Sample Size and Sensitivity/Specificity [closed]
1,765 patients were given a positive/negative screening test for a disease.
N = 415 patients tested positive
N = 1,350 patients tested negative
Due to constraints, not all 1,765 patients were given ...
- 305
2
votes
1
answer
126
views
Is this a valid use of "positive predictive value"?
So here's your typical table for evaluating the performance of a diagnostic test:
Gold standard result
+-----------------------------------...
- 103