Positive and Negative Predictive Values
A higher pre-test probability decreases the
Negative predictive value
A higher sensitivity increased the
Negative predictive value
A higher sensitivity means a higher
Negative predictive value
Out of all negative test results, the proportion from disease negative animals
Negative predictive value
Probability of lack of disease when test result is negative
Negative predictive value
The probability that an animal does not have the disease when the test result is negative
Negative predictive value
True negative over total tested negative
Negative predictive value
When pre-test probability is high, the what increases sharply for changes in PTP
Negative predictive value
A higher pre-test probability increases the
Positive predictive value
A higher specificity increased the
Positive predictive value
A higher specificity means a higher
Positive predictive value
Out of all positive test results, the proportion from disease positive animals
Positive predictive value
Probability of disease in an animal with a positive test result
Positive predictive value
Tests with a higher specificity increases the
Positive predictive value
True positive over total tested positive
Positive predictive value
When pre-test probability is low, the what increases sharply for small changes in PTP
Positive predictive value
Negative predictive value is the probability that an animal does not have the disease when the test results is
Negative
A higher pre-test probability ________ the NPV
Decreases
The calculation for predicitve value incorporates what
Disease positive animals, disease negative animals
What do you want for a ruling out diagnosis
High negative predictive value
What do you want for a ruling in diagnosis
High positive predictive value
A higher pre-test probability _________ the PPV
Increases
Tests with higher sensitivity ________ the NPV
Increases
Tests with higher specificity _______ the PPV
Increases
Positive predictive value is the probability of disease in an animal with a WHAT test result
Positive
A higher ________ decreases the NPV
Pre-test probability
Predictive values are dependent on
Pre-test probability
Dependent on pre-test probability
Predictive values
Probability of a disease status when we known the test result
Predictive values
Represents the level of certainty of diagnosis
Predictive values
`Clear clinical importance
Predictive values
A diagnosis is sufficiently likely that no other possibility should be considered
Ruling in
A high NPV is used for what diagnosis
Ruling out
The diagnosis is sufficiently unlikely that is should no longer be considered as a possibility
Ruling out
Probability of a positive test in an animal known to have the disease
Sensitivity
Probability of a positive test result in an animal with disease
Sensitivity
Probability of a positive test when we know they're diseased
Sensitivity
Proportion of animals that test positive out of a number of animals known to have the disease
Sensitivity
Test with a higher _______ increases the NPV
Sensitivity
Probability of a negative test in an animal known to not have the disease
Specificity
Probability of a negative test when we know they're not diseased
Specificity
Proportion of animals that test negative out of a number of animals known to not have the disease
Specificity
Tests with a higher ______ increases the PPV
Specificity
Head to head comparison of diagnostic tests
Test characteristics
Not dependent on pre-test probability
Test characteristics
The probability of a test result when we know the disease status
Test characteristics
Used to calculate predictive values
Test characteristics
tests with a higher sensitivity increases the
negative predictive value
Probability of disease when test result is positive
positive predictive value
A high PPV is used for what diagnosis
ruling in