Positive and Negative Predictive Values

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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


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